An introduction to designing CSS transitions using AngularJS

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Hello, the mixin!

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Designing CSS Transitions Using AngularJS AN INTRODUCTION TO

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UI logic ! polish & refinement

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WHY I LIKE USING ANGULARJS TO PROTOTYPE INTERACTIONS

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Add or remove servers

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$( "#target" ).click(function() { $( "#another-target" ).addClass( "expanded" ); }); JavaScript

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Write less JavaScript ! ikr?!

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Use features built into AngularJS to animate the transitions on the screen.

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ng-if ! ng-show, ng-hide ! ng-model ! ng-pluralize ANGULAR FEATURES

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I’m Jessica EX-PRODUCT DESIGNER AT

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I LIKE USING A SANDBOX TO DESIGN CSS TRANSITIONS

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Easier to share. ! Straight to the component. ! Easier to isolate bugs. SANDBOX PROS

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Set up a AngularJS sandbox to design a component. I’ll use Plunker Plnkr.co I’LL DEMONSTRATE

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From plnkr.co click “Editor” SETTING UP A SANDBOX Use a template in the drop down tinyurl.com/angular-animate

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ADD ANGULAR-ANIMATE Now Angular’s prefab CSS classes are available to use in CSS transitions.

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SWITCH FROM .CSS to .SCSS “New file”

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SWITCH FROM .CSS to .SCSS Delete style.css Plunker watches & compiles your .scss/.sass extensions

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Define ng-app & ng-controller in the HTML & ! Add ngAnimate & define the controller in app.js var app = angular.module('plunker', ["ngAnimate"]); ! app.controller('MainCtrl', function($scope) {}); HOOKING UP THE ANGULAR ISH Details on what this stuff does is on the AngularJS homepage angularjs.org

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Fork this existing setup where it’s hooked up already: ! tinyurl.com/angular-animate

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Here’s a cat!

CONDITIONALLY DISPLAY DOM ELEMENTS WITH ng-if This DIV would only be rendered if “showCat” evaluated to “true”

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show the cat TOGGLE TRUE/FALSE WITH ng-click hide the cat

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Hint: Watch a variable in the UI by putting it in double curly braces:

showCat is: {{ showCat }}.

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NOW THE BASIC SHOW & HIDE BEHAVIORS ARE SET UP. ! LET’S ADD SOME ANIMATION USING CSS TRANSITIONS.

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Here’s a cat!

WHEN ng-if BECOMES TRUE FALSE TRUE

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Here’s a cat!

WHEN ng-if BECOMES TRUE FALSE TRUE .ng-enter

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Here’s a cat!

WHEN ng-if BECOMES TRUE FALSE TRUE .ng-enter .ng-enter .ng-enter-active

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Here’s a cat!

WHEN ng-if BECOMES TRUE FALSE TRUE .ng-enter .ng-enter .ng-enter-active *poof*

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// the "ng-if true" transition starting point .cat.ng-enter { transition: 0.5s ease all; left: -300px; opacity: 0; } ! // the "ng-if true" transition ending point .cat.ng-enter.ng-enter-active { left: 0px; opacity:1; }

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TRUE FALSE WHEN ng-if BECOMES FALSE

Here’s a cat!

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TRUE FALSE .ng-leave WHEN ng-if BECOMES FALSE

Here’s a cat!

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TRUE FALSE .ng-leave .ng-leave .ng-leave-active WHEN ng-if BECOMES FALSE

Here’s a cat!

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TRUE FALSE .ng-leave .ng-leave .ng-leave-active *poof* WHEN ng-if BECOMES FALSE

Here’s a cat!

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TRUE FALSE .ng-leave .ng-leave .ng-leave-active *poof* WHEN ng-if BECOMES FALSE

Here’s a cat!

(Also bye-bye DOM element)

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// the "ng-if false" transition starting point .cat.ng-leave { -webkit-transition: 0.5s ease all; transition: 0.5s ease all; left: 0px; opacity: 1; } ! // the "ng-if false" transition ending point .cat.ng-leave.ng-leave-active { left: 700px; opacity: 0; }

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CHEATSHEET ng-if CLASS WATERFALL FALSE ! ! TRUE ! ! FALSE .ng-enter .ng-enter.ng-enter-active *poof* (default styling) .ng-leave .ng-leave.ng-leave-active

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CONDITIONALLY DISPLAY DOM ELEMENTS WITH ng-hide & ng-show

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HOW ARE ng-hide & ng-show DIFFERENT FROM ng-if ng-if destroys the DOM element when it is false. ng-hide hides the DOM element with display: none !important; when true. ng-show hides the DOM element with display: none !important; when false.

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HOW ARE ng-hide & ng-show DIFFERENT FROM ng-if ng-if Easiest to use the CSS transitions ng-hide & ng-show • None-destructive to the DOM • Trickier to use the CSS transitions

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WHEN ng-show BECOMES TRUE

Here’s a panel!

This DIV would only be shown if “showPanel” evaluated to “true”

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WHEN ng-show BECOMES TRUE FALSE ! ! ! ! ! TRUE

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WHEN ng-show BECOMES TRUE FALSE ! ! ! ! ! TRUE .ng-hide

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WHEN ng-show BECOMES TRUE FALSE ! ! ! ! ! TRUE .ng-hide Persistent class added to the DOM element when false.

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WHEN ng-show BECOMES TRUE FALSE ! ! ! ! ! TRUE .ng-hide.ng-hide-remove .ng-hide Persistent class added to the DOM element when false.

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WHEN ng-show BECOMES TRUE FALSE ! ! ! ! ! TRUE .ng-hide.ng-hide-remove .ng-hide-remove .ng-hide Persistent class added to the DOM element when false.

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WHEN ng-show BECOMES TRUE FALSE ! ! ! ! ! TRUE .ng-hide.ng-hide-remove .ng-hide-remove *poof* .ng-hide Persistent class added to the DOM element when false.

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WHEN ng-show BECOMES FALSE TRUE ! ! ! ! ! FALSE

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WHEN ng-show BECOMES FALSE TRUE ! ! ! ! ! FALSE *No special classes are added*

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WHEN ng-show BECOMES FALSE TRUE ! ! ! ! ! FALSE .ng-hide-add *No special classes are added*

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WHEN ng-show BECOMES FALSE TRUE ! ! ! ! ! FALSE .ng-hide-add.ng-hide .ng-hide-add *No special classes are added*

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WHEN ng-show BECOMES FALSE TRUE ! ! ! ! ! FALSE .ng-hide-add.ng-hide .ng-hide-add .ng-hide *No special classes are added*

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WHEN ng-show BECOMES FALSE TRUE ! ! ! ! ! FALSE .ng-hide-add.ng-hide .ng-hide-add .ng-hide Persistent class added to the DOM element. *No special classes are added*

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CHEATSHEET ng-show CLASS WATERFALL FALSE ! ! TRUE ! ! FALSE *poof* (default styling) .ng-hide.ng-hide-remove .ng-hide-remove .ng-hide .ng-hide-add.ng-hide .ng-hide-add .ng-hide

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THE THING ABOUT .ng-hide

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.ng-hide { display: none !important; } ANIMATION KILLER!

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.ng-hide.ng-hide-add, .ng-hide.ng-hide-remove { display: block !important; } ANIMATION FIXER

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BUTTON TO TOGGLE showPanel Toggle the panel

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.nav ng-click="showPanel=!showPanel"

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ng-show="showPanel" .panel .nav ng-click="showPanel=!showPanel"

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// Default panel style .panel{ width: 400px; position: fixed; top: 0; bottom: 0; left: 200px; background: grey; } ! // Slide out transition for ng-show .panel.ng-hide { left: -400px; } ! .panel.ng-hide-remove, .panel.ng-hide-add { transition: .3s ease all; // overwrite .ng-hide’s default // of “display: none !important;” display: block !important; }

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The slide-out Plunker ! tinyurl.com/slide-out-animation

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MOCKING UP A FORM WITH ng-show + ng-pluralize ! BONUS: Reusing an animation

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ng-click="scalingActionChosen='true'"

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ng-show="scalingActionChosen"

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ng-show="scalingActionChosen" class=”drop-in ng-hide”

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/* Animation for showing the .scaling-action section */ .drop-in { transition: .3s linear all; opacity: 1; margin-top: 0px; } ! .drop-in.ng-hide { opacity: 0; margin-top: -15px; } ! .drop-in.ng-hide-add, .drop-in.ng-hide-remove { /* this needs to be here to make it visible during the animation */ display: block !important; }

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The .drop-in class can now be applied to other elements with ng-hide or ng-show

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I used it 4 times in this form.

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ng-pluralize

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Remastered Animation in AngularJS 1.2 ! by Year of Moo ! www.yearofmoo.com/2013/08/ remastered-animation-in- angularjs-1-2.html MORE IN DEPTH ARTICLE

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Thanks! @jessicaspacekat