Difference between revisions of "JavaScript"

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* [[MediaWiki/js]] talks about using JavaScript in MediaWiki
 
* [[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.
 
* 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
  
−
[http://phiffer.org Dan Phiffer] wrote the following Greasemonkey script that [http://userscripts.org/scripts/show/6372 turns any MediaWiki article into a slide presentation].  I changed the presentation a bit.
+
== JavaScript Libraries ==
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<source lang="javascript">
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JQuery is included with [[Drupal]], and is also used in many other projects.
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// ==UserScript==
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In this slideshow, you can [http://slideshow.rubyforge.org/jquery.html compare JQuery with Prototype]
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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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setup: function() {
 
  
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this.sections = [];
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=== [http://underscorejs.org/ Underscore.js] ===
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this.pos = 0;
 
  
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var body = document.getElementsByTagName('body')[0];
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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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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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== JavaScript Callbacks ==
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var body = document.getElementsByTagName('body')[0];
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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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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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== JavaScript SourceMaps ==
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prev.innerHTML = '&larr; Prev';
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Debug minified sources in FireFox or Chrome
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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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* [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 stop = body.appendChild(document.createElement('a'));
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== JavaScript 6 ==
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stop.innerHTML = 'Exit';
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stop.setAttribute('href', '#exit');
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* Basic overviews:
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stop.style.font = '11px verdana, sans-serif';
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** [https://github.com/lukehoban/es6features https://github.com/lukehoban/es6features]
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stop.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.stop();
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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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body.appendChild(document.createTextNode(' / '));
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** [https://kangax.github.io/compat-table/es6/ https://kangax.github.io/compat-table/es6/]
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* Sandbox:
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var next = body.appendChild(document.createElement('a'));
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** [https://es6console.com/ https://es6console.com/]
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next.innerHTML = 'Next &rarr;';
 
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next.setAttribute('href', '#next');
 
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next.style.font = '11px verdana, sans-serif';
 
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next.addEventListener('click', function() {
 
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wikipedia_presentation.next();
 
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}, false);
 
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var slide = body.appendChild(document.createElement('div'));
 
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slide.setAttribute('id', 'wikipedia_presentation');
 
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slide.style.width = '780px';
 
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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]]
 +
[[Category:Node.js]]
 +
[[Category:Source]]
 +
[[Category:Programming]]
 +
[[Category:Code]]

Latest revision as of 11:45, 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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