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Here's how those classes look without can.Construct.super:</p> <pre><code>var Person = Construct.extend({ init: function(first, last) { this.first = first; this.last = last; } }); var Programmer = Person.extend({ init: function(first, last, language) { // call base's init Person.prototype.init.apply(this, arguments); // other initialization code this.language = language; }, bio: function() { return "Hi! I'm " + this.first + " " + this.last + " and I write " + this.language + "."; } }); </code></pre> <p>And here's how <code>Programmer</code> works using <code>_super</code>:</p> <pre><code>var Programmer = Person.extend({ init: function(first, last, language) { // call base's init this._super(first, last); // other initialization code this.language = language; }, bio: function() { return "Hi! I'm " + this.first + " " + this.last + " and I write " + this.language + "."; } }); </code></pre> <p>If you want to pass an array of arguments (or an arguments object) to <code>_super</code>, use <a href="https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Function/apply">apply</a>:</p> <pre><code>var Programmer = Person.extend({ init: function(first, last, language) { // call base's init this._super.apply(this, arguments); // other initialization code this.language = language; }, bio: function() { return "Hi! I'm " + this.first + " " + this.last + " and I write " + this.language + "."; } }); </code></pre> <h2><code>_super</code> on constructors</h2> <p>can.Construct.super also adds <code>super</code> to the constructor, so you can use it in static functions.</p> <p>Here is a base class that has a method that squares numbers and an inherited class that has a method that cubes numbers:</p> <pre><code>var Squarer = can.Construct.extend({ raise: function(n) { return n*n; } }, {}); var Cuber = Squarer.extend({ raise: function(n) { return n * this._super(n); } }, {}); </code></pre> </section> <script type="text/javascript"> var docObject = {"src":{"path":"node_modules/can-construct-super/can-construct-super.md"},"description":"\ncan.Construct.super is a plugin that makes it easier to call base\nfunctions from inside inheriting functions.\n","type":"module","title":"","name":"can-construct-super","parent":"can-ecosystem","plugin":"can-construct-super","package":{"_args":[[{"raw":"can-construct-super@3.0.0","scope":null,"escapedName":"can-construct-super","name":"can-construct-super","rawSpec":"3.0.0","spec":"3.0.0","type":"version"},"/Users/kevin/dev/canjs"]],"_from":"can-construct-super@3.0.0","_id":"can-construct-super@3.0.0","_inCache":true,"_location":"/can-construct-super","_nodeVersion":"6.7.0","_npmOperationalInternal":{"host":"packages-12-west.internal.npmjs.com","tmp":"tmp/can-construct-super-3.0.0.tgz_1476485480218_0.07109488197602332"},"_npmUser":{"name":"daffl","email":"daff@neyeon.de"},"_npmVersion":"2.15.0","_phantomChildren":{},"_requested":{"raw":"can-construct-super@3.0.0","scope":null,"escapedName":"can-construct-super","name":"can-construct-super","rawSpec":"3.0.0","spec":"3.0.0","type":"version"},"_requiredBy":["/"],"_resolved":"https://registry.npmjs.org/can-construct-super/-/can-construct-super-3.0.0.tgz","_shasum":"bc4a1382999ad84b79d555e59f200eb3f56afab7","_shrinkwrap":null,"_spec":"can-construct-super@3.0.0","_where":"/Users/kevin/dev/canjs","author":{"name":"Bitovi"},"bit-docs":{"dependencies":{"bit-docs-glob-finder":"^0.0.5","bit-docs-dev":"^0.0.3","bit-docs-js":"^0.0.3","bit-docs-generate-readme":"^0.0.8"},"glob":{"pattern":"can-construct-super.md","ignore":"node_modules/**/*"},"readme":{"apis":"./docs/apis.json"},"parent":"can-stache-bindings"},"bugs":{"url":"https://github.com/canjs/can-construct-super/issues"},"dependencies":{"can-construct":"^3.0.0","can-util":"^3.0.0"},"description":"Provides a reference to the prototypal parent using this._super in can-construct objects","devDependencies":{"bit-docs":"0.0.7","jshint":"^2.9.3","steal":"^0.16.39","steal-qunit":"^0.1.3","steal-tools":"^0.16.8","testee":"^0.3.0-pre.1"},"directories":{},"dist":{"shasum":"bc4a1382999ad84b79d555e59f200eb3f56afab7","tarball":"https://registry.npmjs.org/can-construct-super/-/can-construct-super-3.0.0.tgz"},"gitHead":"72681928a1bdd3f0a0c8e1a4cb73ea265fc7e361","homepage":"https://github.com/canjs/can-construct-super#readme","keywords":["canjs","donejs"],"license":"MIT","main":"can-construct-super","maintainers":[{"name":"bmomberger-bitovi","email":"brad@bitovi.com"},{"name":"daffl","email":"daff@neyeon.de"},{"name":"justinbmeyer","email":"justin@bitovi.com"},{"name":"matthewp","email":"matthew@matthewphillips.info"},{"name":"sinjhin","email":"john@ardea.io"}],"name":"can-construct-super","optionalDependencies":{},"readme":"ERROR: No README data found!","repository":{"type":"git","url":"git+https://github.com/canjs/can-construct-super.git"},"scripts":{"build":"node build.js","develop":"done-serve --static --develop --port 8080","document":"bit-docs","jshint":"jshint ./*.js --config","postversion":"git push --tags && git checkout master && git branch -D release && git push","preversion":"npm test && npm run build","release:major":"npm version major && npm publish","release:minor":"npm version minor && npm publish","release:patch":"npm version patch && npm publish","release:pre":"npm version prerelease && npm publish","test":"npm run jshint && npm run testee","testee":"testee test/test.html --browsers firefox","version":"git commit -am \"Update dist for release\" && git checkout -b release && git add -f dist/"},"system":{"main":"can-construct-super","npmIgnore":["documentjs","testee","generator-donejs","donejs-cli","steal-tools"]},"version":"3.0.0"},"signatures":[{"code":"construct._super([...args])","description":"\n\nCalls the base constructor function's method.\n","params":[{"types":[{"type":"Any"}],"variable":true,"name":"args","description":"parameters to pass to the base function\n"}]}],"_curParam":{"types":[{"type":"Any"}],"variable":true,"name":"args","description":"parameters to pass to the base function\n"},"comment":" ","pathToRoot":".."}; </script> </article> <footer><p>CanJS is part of <a href="http://donejs.com" target="_blank">DoneJS</a>. 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