define("dojo/has", ["require", "module"], function(require, module){ // module: // dojo/has // summary: // Defines the has.js API and several feature tests used by dojo. // description: // This module defines the has API as described by the project has.js with the following additional features: // // - the has test cache is exposed at has.cache. // - the method has.add includes a forth parameter that controls whether or not existing tests are replaced // - the loader's has cache may be optionally copied into this module's has cahce. // // This module adopted from https://github.com/phiggins42/has.js; thanks has.js team! // try to pull the has implementation from the loader; both the dojo loader and bdLoad provide one // if using a foreign loader, then the has cache may be initialized via the config object for this module // WARNING: if a foreign loader defines require.has to be something other than the has.js API, then this implementation fail var has = require.has || function(){}; if(! 1 ){ var isBrowser = // the most fundamental decision: are we in the browser? typeof window != "undefined" && typeof location != "undefined" && typeof document != "undefined" && window.location == location && window.document == document, // has API variables global = this, doc = isBrowser && document, element = doc && doc.createElement("DiV"), cache = (module.config && module.config()) || {}; has = function(name){ // summary: // Return the current value of the named feature. // // name: String|Integer // The name (if a string) or identifier (if an integer) of the feature to test. // // description: // Returns the value of the feature named by name. The feature must have been // previously added to the cache by has.add. return typeof cache[name] == "function" ? (cache[name] = cache[name](global, doc, element)) : cache[name]; // Boolean }; has.cache = cache; has.add = function(name, test, now, force){ // summary: // Register a new feature test for some named feature. // name: String|Integer // The name (if a string) or identifier (if an integer) of the feature to test. // test: Function // A test function to register. If a function, queued for testing until actually // needed. The test function should return a boolean indicating // the presence of a feature or bug. // now: Boolean? // Optional. Omit if `test` is not a function. Provides a way to immediately // run the test and cache the result. // force: Boolean? // Optional. If the test already exists and force is truthy, then the existing // test will be replaced; otherwise, add does not replace an existing test (that // is, by default, the first test advice wins). // example: // A redundant test, testFn with immediate execution: // | has.add("javascript", function(){ return true; }, true); // // example: // Again with the redundantness. You can do this in your tests, but we should // not be doing this in any internal has.js tests // | has.add("javascript", true); // // example: // Three things are passed to the testFunction. `global`, `document`, and a generic element // from which to work your test should the need arise. // | has.add("bug-byid", function(g, d, el){ // | // g == global, typically window, yadda yadda // | // d == document object // | // el == the generic element. a `has` element. // | return false; // fake test, byid-when-form-has-name-matching-an-id is slightly longer // | }); (typeof cache[name]=="undefined" || force) && (cache[name]= test); return now && has(name); }; // since we're operating under a loader that doesn't provide a has API, we must explicitly initialize // has as it would have otherwise been initialized by the dojo loader; use has.add to the builder // can optimize these away iff desired 1 || has.add("host-browser", isBrowser); 1 || has.add("dom", isBrowser); 1 || has.add("dojo-dom-ready-api", 1); 1 || has.add("dojo-sniff", 1); } if( 1 ){ // Common application level tests has.add("dom-addeventlistener", !!document.addEventListener); has.add("touch", "ontouchstart" in document); // I don't know if any of these tests are really correct, just a rough guess has.add("device-width", screen.availWidth || innerWidth); // Tests for DOMNode.attributes[] behavior: // - dom-attributes-explicit - attributes[] only lists explicitly user specified attributes // - dom-attributes-specified-flag (IE8) - need to check attr.specified flag to skip attributes user didn't specify // - Otherwise, in IE6-7. attributes[] will list hundreds of values, so need to do outerHTML to get attrs instead. var form = document.createElement("form"); has.add("dom-attributes-explicit", form.attributes.length == 0); // W3C has.add("dom-attributes-specified-flag", form.attributes.length > 0 && form.attributes.length < 40); // IE8 } has.clearElement = function(element){ // summary: // Deletes the contents of the element passed to test functions. element.innerHTML= ""; return element; }; has.normalize = function(id, toAbsMid){ // summary: // Resolves id into a module id based on possibly-nested tenary expression that branches on has feature test value(s). // // toAbsMid: Function // Resolves a relative module id into an absolute module id var tokens = id.match(/[\?:]|[^:\?]*/g), i = 0, get = function(skip){ var term = tokens[i++]; if(term == ":"){ // empty string module name, resolves to 0 return 0; }else{ // postfixed with a ? means it is a feature to branch on, the term is the name of the feature if(tokens[i++] == "?"){ if(!skip && has(term)){ // matched the feature, get the first value from the options return get(); }else{ // did not match, get the second value, passing over the first get(true); return get(skip); } } // a module return term || 0; } }; id = get(); return id && toAbsMid(id); }; has.load = function(id, parentRequire, loaded){ // summary: // Conditional loading of AMD modules based on a has feature test value. // id: String // Gives the resolved module id to load. // parentRequire: Function // The loader require function with respect to the module that contained the plugin resource in it's // dependency list. // loaded: Function // Callback to loader that consumes result of plugin demand. if(id){ parentRequire([id], loaded); }else{ loaded(); } }; return has; });