Post pobrano z: Iterating a React Design with Styled Components

In a perfect world, our projects would have unlimited resources and time. Our teams would begin coding with well thought out and highly refined UX designs. There would be consensus among developers about the best way to approach styling. There’d be one or more CSS gurus on the team who could ensure that functionality and style could roll out simultaneously without it turning into a train-wreck.

I’ve actually seen this happen in large enterprise environments. It’s a beautiful thing. This article is not for those people.

On the flip side of the coin is the tiny startup that has zero funding, one or two front-end developers, and a very short timeline to demonstrate some functionality. It doesn’t have to look perfect, but it should at least render reasonably well on desktop, tablet, and mobile. This gets them to a point where it can be shown to advisors and early users; maybe even potential investors who’ve expressed an interest in the concept. Once they get some cashflow from sales and/or investment, they can get a dedicated UX designer and polish the interface.

What follows is for this latter group.

Project Kickoff Meeting

Let’s invent a company to get the ball rolling.

Solar Excursions is a small travel agency aiming to serve the near-future’s burgeoning space tourism industry.

Our tiny development team has agreed that React will be used for the UI. One of our front-end developers is big on Sass, and the other is enamored with CSS in JavaScript. But they’ll be hard pressed to knock out their initial sprint goals; there’s certainly no time for arguing about the best possible styling approach. Both coders agree the choice doesn’t matter much in the long run, as long as its consistently executed. They’re certain that implementing the styling from scratch under the gun now will incur technical debt that will have to be cleaned up later.

After some discussion, the team opts to plan for one or more „styling refactor” sprints. For now, we’ll just focus on getting something up on the screen using React-Bootstrap. That way we’ll be able to quickly build working desktop and mobile layouts without much fuss.

The less time spent on front-end styling the better, because we’ll also need the UI to hook up to the services our backend developer will be cranking out. And, as our application architecture begins to take shape, both front-enders agree it’s important that it be unit tested. They have a lot on their plate.

Based on my discussions with the Powers That Be, as a dedicated project manager, I slaved over Balsamiq for at least ten minutes to provide the team with mockups for the booking page on desktop and mobile. I assume they’ll make tablet meet in the middle and look reasonable.

Sprint Zero: Review Meeting

Pizza all around! The team worked really hard to hit its goals, and we now have a booking page with a layout that approximates the mockups. The infrastructure for services is coming together, but there’s quite a way to go before we can connect the UI to it. In the interim, the front-enders are using a hardcoded mock data structure.

Here’s a look at our UI code so far:

This is all straightforward React. We’re using some of that Hooks hotness, but it’s probably passé to most of you by now.

The key takeaway to notice here is how four of our five application components import and use components from react-bootstrap. Only the main App component is unaffected. That’s because it just composes the top level view with our custom components.

// App.js imports
import React, { useState } from "react";
import Navigation from "./Navigation";
import Page from "./Page";

// Navigation.js imports
import React from "react";
import { Navbar, Dropdown, Nav } from "react-bootstrap";

// Page.js imports
import React from "react";
import PosterCarousel from "./PosterCarousel";
import DestinationLayout from "./DestinationLayout";
import { Container, Row, Col } from "react-bootstrap";

// PosterCarousel.js imports
import React from "react";
import { Alert, Carousel, Image } from "react-bootstrap";

// DestinationLayout.js imports
import React, { useState, useEffect } from "react";
import {
  Button,
  Card,
  Col,
  Container,
  Dropdown,
  Jumbotron,
  ListGroup,
  Row,
  ToggleButtonGroup,
  ToggleButton
} from "react-bootstrap";

The decision to move fast with Bootstrap has allowed us to hit our sprint goals, but we’re already accumulating technical debt. This is just four affected components, but as the application grows, it’s clear the „styling refactor” sprints that we planned for are going to become exponentially harder. And we haven’t even customized these components much. Once we have tens of components, all using Bootstrap with lots of inline styling to pretty them up, refactoring them to remove react-bootstrap dependencies will be a scary proposition indeed.

Rather than building more of the booking pipeline pages, the team decides that we’ll spend the next sprint working to isolate the react-bootstrap usage in a custom component kit since our services are still under construction. Application components will only use components from this kit. That way, when it comes time to ween ourselves from react-bootstrap, the process will be much easier. We won’t have to refactor thirty usages of the react-bootstrap Button throughout the app, we’ll just rewrite the internals of our KitButton component.

Sprint One: Review Meeting

Well, that was easy. High-fives. No change to the visual appearance of the UI, but we now have a „kit” folder that’s sibling to „components” in our React source. It has a bunch of files like KitButton.js, which basically export renamed react-bootstrap components.

An example component from our kit looks like this:

// KitButton.js
import { Button, ToggleButton, ToggleButtonGroup } from "react-bootstrap";
export const KitButton = Button;
export const KitToggleButton = ToggleButton;
export const KitToggleButtonGroup = ToggleButtonGroup;

We wrap those all kit components up into a module like this:

// kit/index.js
import { KitCard } from "./KitCard";
import { KitHero } from "./KitHero";
import { KitList } from "./KitList";
import { KitImage } from "./KitImage";
import { KitCarousel } from "./KitCarousel";
import { KitDropdown } from "./KitDropdown";
import { KitAttribution } from "./KitAttribution";
import { KitNavbar, KitNav } from "./KitNavbar";
import { KitContainer, KitRow, KitCol } from "./KitContainer";
import { KitButton, KitToggleButton, KitToggleButtonGroup } from "./KitButton";
export {
  KitCard,
  KitHero,
  KitList,
  KitImage,
  KitCarousel,
  KitDropdown,
  KitAttribution,
  KitButton,
  KitToggleButton,
  KitToggleButtonGroup,
  KitContainer,
  KitRow,
  KitCol,
  KitNavbar,
  KitNav
};

And now our application components are completely free of react-bootstrap. Here are the imports for the affected components:

// Navigation.js imports
import React from "react";
import { KitNavbar, KitNav, KitDropdown } from "../kit";


// Page.js imports 
import React from "react";
import PosterCarousel from "./PosterCarousel";
import DestinationLayout from "./DestinationLayout";
import { KitContainer, KitRow, KitCol } from "../kit";


// PosterCarousel.js imports
import React from "react";
import { KitAttribution, KitImage, KitCarousel } from "../kit";


// DestinationLayout.js imports
import React, { useState, useEffect } from "react";
import {
  KitCard,
  KitHero,
  KitList,
  KitButton,
  KitToggleButton,
  KitToggleButtonGroup,
  KitDropdown,
  KitContainer,
  KitRow,
  KitCol
} from "../kit";

Here’s the front-end codebase now:

Although we’ve corralled all of the react imports into our kit components, our application components still rely a bit on the react-bootstrap implementation because the attributes we place on our kit component instances are the same as those of react-bootstrap. That constrains us when it comes to re-implementing the kit components, because we need to adhere to the same API. For instance:

// From Navigation.js
<KitNavbar bg="dark" variant="dark" fixed="top">

Ideally, we wouldn’t have to add those react-bootstrap specific attributes when we instantiate our KitNavbar.

The front-enders promise to refactor those out as we go, now that we’ve identified them as problematic. And any new references to react-bootstrap components will go into our kit instead of directly into the application components.

Meanwhile, we’ve shared our mock data with the server engineer, who is working hard to build separate server environments, implement the database schema, and expose some services to us.

That gives us time to add some gloss to our UI in the next sprint — which is good because the Powers That Be would like to see separate themes for each destination. As the user browses destinations, we need to have the UI color scheme change to match the displayed travel poster. Also, we want to try and spiff up those components a bit to begin evolving our own look and feel. Once we have some money coming in, we’ll get a designer to do a complete overhaul, but hopefully we can reach a happy medium for our early users.

Sprint Two: Review Meeting

Wow! The team really pulled out all the stops this sprint. We got per-destination themes, customized components, and a lot of the lingering react-bootstrap API implementations removed from the application components.

Here’s what the desktop looks like now:

In order to pull this off, the front-enders brought in the Styled Components library. It made styling the individual kit components a breeze, as well as adding support for multiple themes.

Let’s look at a few highlights of their changes for this sprint.

First, for global things like pulling in fonts and setting the page body styles, we have a new kit component called KitGlobal.

// KitGlobal.js
import { createGlobalStyle } from "styled-components";
export const KitGlobal = createGlobalStyle`
  body {
    @import url('https://fonts.googleapis.com/css?family=Orbitron:500|Nunito:600|Alegreya+Sans+SC:700');
    background-color: ${props => props.theme.foreground};
    overflow-x: hidden;
  }
`;

It uses the createGlobalStyle helper to define the CSS for the body element. That imports our desired web fonts from Google, sets the background color to whatever the current theme’s „foreground” value is, and turns off overflow in the x-direction to eliminate a pesky horizontal scrollbar. We use that KitGlobal component in the render method of our App component.

Also in the App component, we import ThemeProvider from styled-components, and something called „themes” from ../theme. We use React’s useState to set the initial theme to themes.luna and React’s useEffect to call setTheme whenever the „destination” changes. The returned component is now wrapped in ThemeProvider, which is passed „theme” as a prop. Here’s the App component in its entirety.

// App.js
import React, { useState, useEffect } from "react";
import { ThemeProvider } from "styled-components";
import themes from "../theme/";
import { KitGlobal } from "../kit";
import Navigation from "./Navigation";
import Page from "./Page";
export default function App(props) {
  const [destinationIndex, setDestinationIndex] = useState(0);
  const [theme, setTheme] = useState(themes.luna);
  const destination = props.destinations[destinationIndex];
  useEffect(() => {
    setTheme(themes[destination.theme]);
  }, [destination]);

  return (
    <ThemeProvider theme={theme}>
      <React.Fragment>
        <KitGlobal />
        <Navigation
          {...props}
          destinationIndex={destinationIndex}
          setDestinationIndex={setDestinationIndex}
        />
        <Page
          {...props}
          destinationIndex={destinationIndex}
          setDestinationIndex={setDestinationIndex}
        />
      </React.Fragment>
    </ThemeProvider>
  );
}

KitGlobal is rendering like any other component. Nothing special there, only that the body tag is affected. ThemeProvider is using the React Context API to pass theme down to whatever components need it (which is all of them). In order to fully understand that, we also need to take a look at what a theme actually is.

To create a theme, one of our front-enders took all the travel posters and created palettes for each by extracting the prominent colors. That was fairly simple.

Obviously, we weren’t going to use all the colors. The approach was mainly to dub the most used two colors foreground and background. Then we took three more colors, generally ordered from lightest to darkest as accent1, accent2, and accent3. Finally, we picked two contrasting colors to call text1 and text2. For the above destination, that looked like:

// theme/index.js (partial list)
const themes = {
  ...
  mars: {
    background: "#a53237",
    foreground: "#f66f40",
    accent1: "#f8986d",
    accent2: "#9c4952",
    accent3: "#f66f40",
    text1: "#f5e5e1",
    text2: "#354f55"
  },
  ...
};
export default themes;

Once we have a theme for each destination, and it is being passed into all the components (including the kit components that our application components are now built from), we need to use styled-components to apply those theme colors as well as our custom visual styling, like the panel corners and „border glow.”

This is a simple example where we made our KitHero component apply the theme and custom styles to the Bootstrap Jumbotron:

// KitHero.js
import styled from "styled-components";
import { Jumbotron } from "react-bootstrap";

export const KitHero = styled(Jumbotron)`
  background-color: ${props => props.theme.accent1};
  color: ${props => props.theme.text2};
  border-radius: 7px 25px;
  border-color: ${props => props.theme.accent3};
  border-style: solid;
  border-width: 1px;
  box-shadow: 0 0 1px 2px #fdb813, 0 0 3px 4px #f8986d;
  font-family: "Nunito", sans-serif;
  margin-bottom: 20px;
`;

In this case, we’re good to go with what gets returned from styled-components, so we just name it KitHero and export it.

When we use it in the application, it looks like this:

// DestinationLayout.js (partial code)
const renderHero = () => {
  return (
    <KitHero>
      <h2>{destination.header}</h2>
      <p>{destination.blurb}</p>
      <KitButton>Book Your Trip Now!</KitButton>
    </KitHero>
  );
};

Then there are more complex cases where we want to preset some attributes on the react-bootstrap component. For instance, the KitNavbar component which we identified earlier as having a bunch of react-bootstrap attributes that we’d rather not pass from the application’s declaration of the component.

Now for a look at how that was handled:

// KitNavbar.js (partial code)
import React, { Component } from "react";
import styled from "styled-components";
import { Navbar } from "react-bootstrap";

const StyledBootstrapNavbar = styled(Navbar)`
  background-color: ${props => props.theme.background};
  box-shadow: 0 0 1px 2px #fdb813, 0 0 3px 4px #f8986d;
  display: flex;
  flex-direction: horizontal;
  justify-content: space-between;
  font-family: "Nunito", sans-serif;
`;

export class KitNavbar extends Component {
  render() {
    const { ...props } = this.props;
    return <StyledBootstrapNavbar fixed="top" {...props} />;
  }
}

First, we create a component called StyledBootstrapNavbar using styled-components. We were able to handle some of the attributes with the CSS we passed to styled-components. But in order to continue leveraging (for now) the reliable stickiness of the component to the top of the screen while everything else is scrolled, our front-enders elected to continue using react-bootstrap’s fixed attribute. In order to do that, we had to create a KitNavbar component that rendered an instance of StyledBootstrapNavbar with the fixed=top attribute. We also passed through all the props, which includes its children.

We only have to create a separate class that renders styled-component’s work and passes props through to it if we want to explicitly set some attributes in our kit component by default. In most cases, we can just name and return styled-component’s output and use it as we did with KitHero above.

Now, when we render the KitNavbar in our application’s Navigation component, it looks like this:

// Navigation.js (partial code)
return (
  <KitNavbar>
    <KitNavbarBrand>
      <KitLogo />
      Solar Excursions
    </KitNavbarBrand>
    {renderDestinationMenu()}
  </KitNavbar>
);

Finally, we took our first stabs at refactoring our kit components away from react-bootstrap. The KitAttribution component is a Bootstrap Alert which, for our purposes, is little more than an ordinary div. We were able to easily refactor to remove its dependency on react-bootstrap.

This is the component as it emerged from the previous sprint:

// KitAttribution.js (using react-bootstrap)
import { Alert } from "react-bootstrap";
export const KitAttribution = Alert;

This is what it looks like now:

// KitAttribution.js
import styled from "styled-components";
export const KitAttribution = styled.div`
  text-align: center;
  background-color: ${props => props.theme.accent1};
  color: ${props => props.theme.text2};
  border-radius: 7px 25px;
  border-color: ${props => props.theme.accent3};
  border-style: solid;
  border-width: 1px;
  box-shadow: 0 0 1px 2px #fdb813, 0 0 3px 4px #f8986d;
  font-family: "Alegreya Sans SC", sans-serif;
  > a {
    color: ${props => props.theme.text2};
    font-family: "Nunito", sans-serif;
  }
  > a:hover {
    color: ${props => props.theme.background};
    text-decoration-color: ${props => props.theme.accent3};
  }
`;

Notice how we no longer import react-bootstrap and we use styled.div as the component base. They won’t all be so easy, but it’s a process.

Here are the results of our team’s styling and theming efforts in sprint two:

View the themed page on its own here.

Conclusion

After three sprints, our team is well on its way to having a scalable component architecture in place for the UI.

• We are moving quickly thanks to react-bootstrap, but are no longer piling up loads of technical debt as a result of it.
• Thanks to styled-components, we were able to implement multiple themes (like how almost every app on the Internet these days sports dark and light modes). We also don’t look like an out-of-the-box Bootstrap app anymore.
• By implementing a custom component kit that contains all references to react-bootstrap, we can refactor away from it as time permits.

The post Iterating a React Design with Styled Components appeared first on CSS-Tricks.

Post pobrano z: Evergreen Googlebot

I’ve heard people say that the #1 most exciting and important thing that came out of Google I/O this year was the evergreen Googlebot:

Today, we are happy to announce that Googlebot now runs the latest Chromium rendering engine (74 at the time of this post) when rendering pages for Search. Moving forward, Googlebot will regularly update its rendering engine to ensure support for latest web platform features.

Before this, I guess I never even thought about it.

I guess part of it is that some people did already know that the old version didn’t support some newfangled JavaScript stuff, and thus literally packaged their app with old JavaScript to be more SEO-friendly.

A bunch of people were apparently shipping older code simply for the sake of Googlebot, and now they don’t have to. Sure, I’ll call that a win.

Don’t read this news as „don’t worry about your JavaScript-rendered pages and SEO” though, because Google Webmasters is still telling us that pages with content that requires JavaScript to render are put into a special slower queue for both initial crawling and for updates. Not necessarily a penalty, but certainly a delay. I’m sure that’s enough to make server-side rendering a priority for sites where SEO is the whole ballgame.

Direct Link to Article — Permalink

The post Evergreen Googlebot appeared first on CSS-Tricks.

Post pobrano z: Everything You Ever Wanted to Know About inputmode

The inputmode global attribute provides a hint to browsers for devices with onscreen keyboards to help them decide which keyboard to display when a user has selected any input or textarea element.

<input type="text" inputmode="" />
<textarea inputmode="" />

Unlike changing the type of the form, inputmode doesn’t change the way the browser interprets the input — it instructs the browser which keyboard to display.

The inputmode attribute has a long history but has only very recently been adopted by the two major mobile browsers: Safari for iOS and Chrome for Android. Before that, it was implemented in Firefox for Android way back in 2012, and then subsequently removed several months later (though it is still available via a flag).

Almost six years later, Chrome for Android implemented the feature — and with the recent release of iOS 12.2, Safari now supports it too.

But before we go deep into the ins and outs of the attribute, consider that the WHATWG living standard provides inputmode documentation while the W3C 5.2 spec no longer lists it in its contents, which suggests they consider it obsolete. Given that WHATWG has documented it and browsers have worked toward supporting it, we’re going to go assume WHATWG specifications are the standard.

inputmode accepts a number of values. Let’s go through them, one by one.

None

<input type="text" inputmode="none" />

We’re starting here because it’s very possible we don’t want any type of keyboard on an input. Using inputmode=none will not show a keyboard at all on Chrome for Android. iOS 12.2 will still show its default alphanumeric keyboard, so specifying none could be sort of a reset for iOS in that regard. Regardless, none is intended for content that renders its own keyboard control.

Numeric

<input type="text" inputmode="numeric" />

This one is probably the one of the more common inputmode values out in the wild because it’s ideal for inputs that require numbers but no letters — things like PIN entry, zip codes, credit card numbers, etc. Using the numeric value with an input of type="text" may actually make more sense than setting the input to type="number" alone because, unlike a numeric input, inputmode="numeric" can be used with maxlength, minlength and pattern attributes, making it more versatile for different use cases.

I’ve often seen sites using type=tel on an input to display a numeric keyboard, and that checks out as a workaround, but isn’t semantically correct. If that bums you out, remember that inputmode supports patterns, we can add pattern="\d*" to the input for the same effect. That said, only use this if you are certain the input should only allow numeric input because Android (unlike iOS) doesn’t allow the user to change to the keyboard to use letters, which might inadvertently prevent users from submitting valid data.

Tel

<input type="text" inputmode="tel" />

Entering a telephone number using a standard alphanumeric keyboard can be a pain. For one, each number on a telephone keyboard (except 1 and 0) represents three letters (e.g. 2 represents A, B and C) which are displayed with the number. The alphanumeric keyboard does not reference those letters, so decoding a telephone number containing letters (e.g. 1-800-COLLECT) takes more mental power.

Using inputmode set to tel will produce a standard-looking telephone keyboard, including keys for digits 0 to 9, the pound (#) character, and the asterisk (*) character. Plus, we get those alphabetic mnemonic labels (e.g. ABC).

Decimal

<input type="text" inputmode="decimal" />

An inputmode set to the decimal value results in a subtle change in iOS where the keyboard appears to be exactly the same as the tel value, but replaces the +*# key with a simple decimal (.). On the flip side, this has no effect on Android, which will simply use the numeric keyboard.

Email

<input type="text" inputmode="email" />

I’m sure you (and at least someone you know) has filled out a form that asks for an email address, only to make you swap keyboards to access the @ character. It’s not life-threatening or anything, but certainly not a great user experience either.

That’s where the email value comes in. It brings the @ character into the fray, as well as the decimal (.) character.

This could also be a useful keyboard to show users who need to enter a Twitter username, given that@ is a core Twitter character for identifying users. However, the email address suggestions that iOS display above the keyboard may cause confusion.

Another use case could be if you have your own email validation script and don’t want to use the browsers built-in email validation.

URL

<input type="text" inputmode="url" />

The url value provides a handy shortcut for users to append TLDs (e.g. .com or .co.uk) with a single key, as well keys typically used in web addresses, like the dot (.) and forward slash (/) characters. The exact TLD displayed on the keyboard is tied to the user’s locale.

This could also be a useful keyboard to show users if your input accepts domain names (e.g. css-tricks.com) as well as full URIs (e.g. https://css-tricks.com). Use type="url" instead if your input requires validating the input.

Search

<input type="text" inputmode="search" />

This displays a blue Go key on iOS and a green Enter key on Android, both in place of where Return. As you may have guessed by the value’s name, search is useful for search forms, providing that submission key to make a query.

If you’d like to showSearch instead of Enter on iOS and a magnifying glass icon on Android in place of the green arrow, use type=search instead.

Other things you oughta know

• Chromium-based browsers on Android — such as Microsoft Edge, Brave and Opera — share the same inputmode behavior as Chrome.
• I haven’t included details of keyboards on iPad for the sake of brevity. It’s mostly the same as iPhone but includes more keys. Same is true for Android tablets, save for third-party keyboards, which might be another topic worth covering.
• The original proposed spec had the values kana and katakana for Japanese input but they were never implemented by any browser and have since been removed from the spec.
• latin-name was also one of the values of the original spec and has since been removed. Interestingly, if it’s used now on Safari for iOS, it will display the user’s name as a suggestion above the keyboard.

  

Demo

Oh, you want to see how all of these input modes work for yourself? Here’s a demo you can use on a device with a touchscreen keyboard to see the differences.

References

• WHATWG specification
• MDN documentation
• Caniuse
• Chrome Platform Status (Chromium Ticket #244688)

The post Everything You Ever Wanted to Know About inputmode appeared first on CSS-Tricks.

Post pobrano z: Everything You Ever Wanted to Know About inputmode

The inputmode global attribute provides a hint to browsers for devices with onscreen keyboards to help them decide which keyboard to display when a user has selected any input or textarea element.

<input type="text" inputmode="" />
<textarea inputmode="" />

Unlike changing the type of the form, inputmode doesn’t change the way the browser interprets the input — it instructs the browser which keyboard to display.

The inputmode attribute has a long history but has only very recently been adopted by the two major mobile browsers: Safari for iOS and Chrome for Android. Before that, it was implemented in Firefox for Android way back in 2012, and then subsequently removed several months later (though it is still available via a flag).

Almost six years later, Chrome for Android implemented the feature — and with the recent release of iOS 12.2, Safari now supports it too.

But before we go deep into the ins and outs of the attribute, consider that the WHATWG living standard provides inputmode documentation while the W3C 5.2 spec no longer lists it in its contents, which suggests they consider it obsolete. Given that WHATWG has documented it and browsers have worked toward supporting it, we’re going to go assume WHATWG specifications are the standard.

inputmode accepts a number of values. Let’s go through them, one by one.

None

<input type="text" inputmode="none" />

We’re starting here because it’s very possible we don’t want any type of keyboard on an input. Using inputmode=none will not show a keyboard at all on Chrome for Android. iOS 12.2 will still show its default alphanumeric keyboard, so specifying none could be sort of a reset for iOS in that regard. Regardless, none is intended for content that renders its own keyboard control.

Numeric

<input type="text" inputmode="numeric" />

This one is probably the one of the more common inputmode values out in the wild because it’s ideal for inputs that require numbers but no letters — things like PIN entry, zip codes, credit card numbers, etc. Using the numeric value with an input of type="text" may actually make more sense than setting the input to type="number" alone because, unlike a numeric input, inputmode="numeric" can be used with maxlength, minlength and pattern attributes, making it more versatile for different use cases.

I’ve often seen sites using type=tel on an input to display a numeric keyboard, and that checks out as a workaround, but isn’t semantically correct. If that bums you out, remember that inputmode supports patterns, we can add pattern="\d*" to the input for the same effect. That said, only use this if you are certain the input should only allow numeric input because Android (unlike iOS) doesn’t allow the user to change to the keyboard to use letters, which might inadvertently prevent users from submitting valid data.

Tel

<input type="text" inputmode="tel" />

Entering a telephone number using a standard alphanumeric keyboard can be a pain. For one, each number on a telephone keyboard (except 1 and 0) represents three letters (e.g. 2 represents A, B and C) which are displayed with the number. The alphanumeric keyboard does not reference those letters, so decoding a telephone number containing letters (e.g. 1-800-COLLECT) takes more mental power.

Using inputmode set to tel will produce a standard-looking telephone keyboard, including keys for digits 0 to 9, the pound (#) character, and the asterisk (*) character. Plus, we get those alphabetic mnemonic labels (e.g. ABC).

Decimal

<input type="text" inputmode="decimal" />

An inputmode set to the decimal value results in a subtle change in iOS where the keyboard appears to be exactly the same as the tel value, but replaces the +*# key with a simple decimal (.). On the flip side, this has no effect on Android, which will simply use the numeric keyboard.

Email

<input type="text" inputmode="email" />

I’m sure you (and at least someone you know) has filled out a form that asks for an email address, only to make you swap keyboards to access the @ character. It’s not life-threatening or anything, but certainly not a great user experience either.

That’s where the email value comes in. It brings the @ character into the fray, as well as the decimal (.) character.

This could also be a useful keyboard to show users who need to enter a Twitter username, given that@ is a core Twitter character for identifying users. However, the email address suggestions that iOS display above the keyboard may cause confusion.

Another use case could be if you have your own email validation script and don’t want to use the browsers built-in email validation.

URL

<input type="text" inputmode="url" />

The url value provides a handy shortcut for users to append TLDs (e.g. .com or .co.uk) with a single key, as well keys typically used in web addresses, like the dot (.) and forward slash (/) characters. The exact TLD displayed on the keyboard is tied to the user’s locale.

This could also be a useful keyboard to show users if your input accepts domain names (e.g. css-tricks.com) as well as full URIs (e.g. https://css-tricks.com). Use type="url" instead if your input requires validating the input.

Search

<input type="text" inputmode="search" />

This displays a blue Go key on iOS and a green Enter key on Android, both in place of where Return. As you may have guessed by the value’s name, search is useful for search forms, providing that submission key to make a query.

If you’d like to showSearch instead of Enter on iOS and a magnifying glass icon on Android in place of the green arrow, use type=search instead.

Other things you oughta know

• Chromium-based browsers on Android — such as Microsoft Edge, Brave and Opera — share the same inputmode behavior as Chrome.
• I haven’t included details of keyboards on iPad for the sake of brevity. It’s mostly the same as iPhone but includes more keys. Same is true for Android tablets, save for third-party keyboards, which might be another topic worth covering.
• The original proposed spec had the values kana and katakana for Japanese input but they were never implemented by any browser and have since been removed from the spec.
• latin-name was also one of the values of the original spec and has since been removed. Interestingly, if it’s used now on Safari for iOS, it will display the user’s name as a suggestion above the keyboard.

  

Demo

Oh, you want to see how all of these input modes work for yourself? Here’s a demo you can use on a device with a touchscreen keyboard to see the differences.

References

• WHATWG specification
• MDN documentation
• Caniuse
• Chrome Platform Status (Chromium Ticket #244688)

The post Everything You Ever Wanted to Know About inputmode appeared first on CSS-Tricks.

Post pobrano z: Weekly news: PWA Issue on iOS, Performance Culture, Anti-Tracking in Browsers

Šime posts regular content for web developers on webplatform.news. Each week, he covers timely news at the intersection of development standards and the tools that make them available on the web.

Installed PWAs cannot easily be restarted on iOS

iOS 12.2 PWAs
🔁 In-App browser for external content (OAuth)
💾 New lifecycle (No Reload)
🔙Navigation gestures
🤝WebShare
⚠️Motion Sensors disabled; old getUserMedia removed
👍 IntersectionObserver, ConicGradients, datalist, color picker, AbortFetchhttps://t.co/LNzq6MzqjR

— Maximiliano Firtman @ 🇱🇹 Vilnius (@firt) March 26, 2019

Maximiliano Firtman: On iOS, it is not possible to restart an installed PWA by closing it from the recently used apps screen and then immediately reopening it. Instead of restarting the app, iOS restores its state. This can be a problem for users if the PWA gets stuck in a broken state.

<input> with type 'file' bug on #iOS 12.2 #PWA
Open the input, put the PWA in bg by pressing home button. The input stops working. True for any input with type 'file' throughout the app. It works after a phone restart. pic.twitter.com/IfzsXy91RK

— Pankaj Nathani ⭐️ (@croozeus) April 11, 2019

After some undefined time, the saved context seems to disappear. So if you get out of the PWA, do nothing with your phone and wait some hours to go back to the PWA, it restarts from scratch.

Instilling a performance culture at The Telegraph

We've been working hard at The Telegraph to improve third-party performance. Here is an insight into our approach – https://t.co/4hhRDYaidS #webperf ⚡️

— Gareth Clubb (@digitalclubb) April 30, 2019

Gareth Clubb: At The Telegraph (a major UK newspaper), we set up a web performance working group to tackle our “organizational” performance challenges and instill a performance culture. The group meets regularly to review third-party tags and work on improving our site’s performance.

We’ve started deferring all JavaScript (including our own) using the <script defer> attribute. This change alone nearly doubled our (un-throttled) Lighthouse performance score.

Deferring our JavaScript hasn’t skewed any existing analytics and it certainly hasn’t delayed any advertising. […] The First Ad Loaded metric improved by an average of four seconds.

We also removed 1 MB of third-party payload from our new front end. When one of our teams requests the addition of any new script, we now test the script in isolation and reject it if it degrades our metrics (first contentful paint, etc.).

When we started this process, we had a collection of very old scripts and couldn’t track the original requester. We removed those on the premise that, if they were important, people would get back in touch — no one did.

Microsoft plans to add tracking prevention to the Edge browser

Kyle Pflug: Microsoft has announced plans to add options for blocking trackers to the Edge browser. Malicious trackers would be blocked automatically, and the user would have the option to additionally block all potential trackers.

This would make Edge the fourth major browser with some form of built-in anti-tracking feature (two other major browsers, Opera and UC Browser, include ad blockers instead).

1. In 2015, Firefox added Tracking Protection — recently renamed to Content Blocking — becoming the first major browser to protect users from third-party trackers (when browsing the web in private mode).
2. Since 2017, Safari prevents cross-site tracking by default, through a feature called Intelligent Tracking Prevention (ITP). Users are prompted to allow tracking when they try to interact with third-party widgets on websites.

   

3. Earlier this year, Samsung Internet added an experimental feature called Smart Anti-Tracking that denies third-party trackers access to cookies.

The post Weekly news: PWA Issue on iOS, Performance Culture, Anti-Tracking in Browsers appeared first on CSS-Tricks.