Difference between revisions of "JavaScript"

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* [[MediaWiki/js]]
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Get [[wp:Greasemonkey]] ([https://addons.mozilla.org/en-US/firefox/addon/748 here]) so that you can have your browser be even more useful.  You might even want to use [http://monkey.coolspacer.com/ Super Greasemonkey] if you like using the awesome [http://jquery.com/ JQuery] library.  I'm hoping that Super Greasemonkey makes it into the official version, and that you can specify in your script which JQuery library to run (like Google's hosted JQuery scripts) making it easier to keep compatibility with the JQuery API version and also avoiding the need to bundle JQuery.
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* [[User Scripts]] ala Grease Monkey or Userscripts.org
 
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[http://phiffer.org Dan Phiffer] wrote this little greasemonkey script that turns any mediawiki article into a slide presentation
 
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<source lang="javascript">
 
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// ==UserScript==
 
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// @name          Wikipedia Presentation
 
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// @namespace      http://phiffer.org/
 
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// @description    Turn a Wikipedia article into a presentation
 
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// ==/UserScript==
 
  
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var wikipedia_presentation = {
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* [[MediaWiki/js]] talks about using JavaScript in MediaWiki
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setup: function() {
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* User Scripts are JavaScripts that you insert into your web browser such as Greasemonkey scripts. Userscripts.org is the open source repository of Grease Monkey scripts.
 +
* [[MediaWiki/Presentation]] describes methods to produce presentations from your wiki
  
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this.sections = [];
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== JavaScript Libraries ==
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this.pos = 0;
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JQuery is included with [[Drupal]], and is also used in many other projects.
 +
In this slideshow, you can [http://slideshow.rubyforge.org/jquery.html compare JQuery with Prototype]
  
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var body = document.getElementsByTagName('body')[0];
 
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this.orig_markup = body.innerHTML;
 
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var markup = body.innerHTML;
 
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var start = 0;
 
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var end = markup.indexOf('<span class="editsection"');
 
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while (end != -1) {
 
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start = markup.indexOf('</span>', end);
 
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end = markup.indexOf('<span class="editsection"', start);
 
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if (end == -1) {
 
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end = markup.indexOf('<div class="printfooter">', start);
 
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this.sections.push(markup.substr(start, end - start));
 
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end = -1;
 
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}
 
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this.sections.push(markup.substr(start, end - start));
 
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}
 
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if (this.sections.length > 0) {
 
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var div = document.getElementById('bodyContent');
 
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var link = div.insertBefore(document.createElement('a'), div.firstChild);
 
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link.innerHTML = 'Start presentation';
 
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link.setAttribute('href', '#presentation');
 
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link.addEventListener('click', this.start, false);
 
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}
 
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},
 
  
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start: function() {
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=== [http://underscorejs.org/ Underscore.js] ===
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var body = document.getElementsByTagName('body')[0];
 
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body.innerHTML = '';
 
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body.style.textAlign = 'center';
 
  
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var prev = body.appendChild(document.createElement('a'));
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Underscore is a JavaScript library that provides a whole mess of useful functional programming helpers without extending any built-in objects. It�s the answer to the question: �If I sit down in front of a blank HTML page, and want to start being productive immediately, what do I need?� � and the tie to go along with jQuery's tux and Backbone's suspenders.  
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prev.innerHTML = '&larr; Prev';
 
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prev.setAttribute('href', '#prev');
 
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prev.style.font = '11px verdana, sans-serif';
 
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prev.addEventListener('click', function() {
 
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wikipedia_presentation.prev();
 
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}, false);
 
  
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body.appendChild(document.createTextNode(' / '));
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== JavaScript Callbacks ==
 +
A great explanation of what are Callbacks and how to use them: http://javascriptissexy.com/understand-javascript-callback-functions-and-use-them/
  
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var stop = body.appendChild(document.createElement('a'));
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== JavaScript SourceMaps ==
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stop.innerHTML = 'Exit';
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Debug minified sources in FireFox or Chrome
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stop.setAttribute('href', '#exit');
 
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stop.style.font = '11px verdana, sans-serif';
 
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stop.addEventListener('click', function() {
 
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wikipedia_presentation.stop();
 
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}, false);
 
  
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body.appendChild(document.createTextNode(' / '));
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* [https://www.html5rocks.com/en/tutorials/developertools/sourcemaps/ tutorial]
 +
* [https://developer.mozilla.org/en-US/docs/Tools/Debugger/Source_map_errors Debugging Source map errors]
  
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var next = body.appendChild(document.createElement('a'));
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== JavaScript 6 ==
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next.innerHTML = 'Next &rarr;';
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next.setAttribute('href', '#next');
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* Basic overviews:
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next.style.font = '11px verdana, sans-serif';
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** [https://github.com/lukehoban/es6features https://github.com/lukehoban/es6features]
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next.addEventListener('click', function() {
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** [https://blog.pragmatists.com/top-10-es6-features-by-example-80ac878794bb https://blog.pragmatists.com/top-10-es6-features-by-example-80ac878794bb]
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wikipedia_presentation.next();
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* Outstanding book:
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}, false);
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** [http://exploringjs.com/es6/ http://exploringjs.com/es6/]
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* The "Can I use?"...
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var slide = body.appendChild(document.createElement('div'));
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** [https://kangax.github.io/compat-table/es6/ https://kangax.github.io/compat-table/es6/]
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slide.setAttribute('id', 'wikipedia_presentation');
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* Sandbox:
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slide.style.width = '780px';
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** [https://es6console.com/ https://es6console.com/]
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slide.style.margin = '10px 10px 10px 20px';
 
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slide.style.textAlign = 'left';
 
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slide.style.font = '2em verdana, sans-serif';
 
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slide.innerHTML = wikipedia_presentation.sections[0];
 
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var items = slide.getElementsByTagName('li');
 
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for (var i = 1; i < items.length; i++) {
 
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items[i].style.display = 'none';
 
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}
 
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document.addEventListener('keypress', wikipedia_presentation.keypress, false);
 
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},
 
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stop: function() {
 
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var body = document.getElementsByTagName('body')[0];
 
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body.innerHTML = wikipedia_presentation.orig_markup;
 
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body.style.textAlign = 'left';
 
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wikipedia_presentation.setup();
 
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document.removeEventListener('keypress', wikipedia_presentation.keypress, false);
 
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},
 
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keypress: function(event) {
 
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if (event.keyCode == 39) {
 
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wikipedia_presentation.next();
 
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} else if (event.keyCode == 37) {
 
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wikipedia_presentation.prev();
 
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}
 
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},
 
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prev: function() {
 
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this.pos--;
 
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if (this.pos == -1) {
 
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this.pos = this.sections.length - 1;
 
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}
 
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var slide = document.getElementById('wikipedia_presentation');
 
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slide.innerHTML = wikipedia_presentation.sections[this.pos];
 
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},
 
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next: function() {
 
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var slide = document.getElementById('wikipedia_presentation');
 
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var items = slide.getElementsByTagName('li');
 
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var hidden = 0;
 
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for (var i = 0; i < items.length; i++) {
 
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if (items[i].style.display == 'none') {
 
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hidden++;
 
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}
 
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}
 
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if (hidden > 0) {
 
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items[items.length - hidden].style.display = 'list-item';
 
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return;
 
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}
 
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this.pos++;
 
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if (this.pos == this.sections.length) {
 
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this.pos = 0;
 
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}
 
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slide.innerHTML = wikipedia_presentation.sections[this.pos];
 
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var items = slide.getElementsByTagName('li');
 
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for (var i = 1; i < items.length; i++) {
 
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items[i].style.display = 'none';
 
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}
 
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}
 
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};
 
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wikipedia_presentation.setup();
 
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</source>
 
  
 
[[Category:JavaScript]]
 
[[Category:JavaScript]]
 
[[Category:Wiki]]
 
[[Category:Wiki]]
 +
[[Category:Front-end]]
 +
[[Category:Back-end]]
 +
[[Category:Server]]
 +
[[Category:Node]]
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[[Category:Node.js]]
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[[Category:Source]]
 +
[[Category:Programming]]
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[[Category:Code]]

Latest revision as of 12:45, 19 December 2018

Get wp:Greasemonkey (here) so that you can have your browser be even more useful. You might even want to use Super Greasemonkey if you like using the awesome JQuery library. I'm hoping that Super Greasemonkey makes it into the official version, and that you can specify in your script which JQuery library to run (like Google's hosted JQuery scripts) making it easier to keep compatibility with the JQuery API version and also avoiding the need to bundle JQuery.

  • MediaWiki/js talks about using JavaScript in MediaWiki
  • User Scripts are JavaScripts that you insert into your web browser such as Greasemonkey scripts. Userscripts.org is the open source repository of Grease Monkey scripts.
  • MediaWiki/Presentation describes methods to produce presentations from your wiki

JavaScript Libraries[edit | edit source]

JQuery is included with Drupal, and is also used in many other projects. In this slideshow, you can compare JQuery with Prototype


Underscore.js[edit | edit source]

Underscore is a JavaScript library that provides a whole mess of useful functional programming helpers without extending any built-in objects. It�s the answer to the question: �If I sit down in front of a blank HTML page, and want to start being productive immediately, what do I need?� � and the tie to go along with jQuery's tux and Backbone's suspenders.

JavaScript Callbacks[edit | edit source]

A great explanation of what are Callbacks and how to use them: http://javascriptissexy.com/understand-javascript-callback-functions-and-use-them/

JavaScript SourceMaps[edit | edit source]

Debug minified sources in FireFox or Chrome

JavaScript 6[edit | edit source]

Application Programming Interface

HyperText Markup Language = structured text that uses logical links (hyperlinks) between nodes containing text.

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