如何在已解析的dojo ContentPane中使用dijit require

Question

I am trying to do a simple task. This task is to load a HTML containg dijit.Form into a ContentPane . I don't know which dijits I will need before I load this HTML, but the loaded HTML will contain applicable require 's to load them.

So in order to be able to execute the script from loaded HTML I use dojox.layout.ContentPane . However when I set parseOnLoad to true , the parsing takes place before the script execution, so the dijits aren't available when first loading the content. Also when I try to use onDownloadEnd callback, when this callback is run, the dijits from require 's are still not loaded.

Only thing I can think of myself is using setTimeout to defer parsing to a time when these scripts will be executed. I don't like this solution however as it may fail from time to time and it would make the application less responsible.

So how should I perform the parsing so that it happens right after the require statement from loaded HTML is run?

Answer 1

I can see two possible solutions - both with dijit/layout/ContentPane :

1. Use Dojo 1.8.0, as the parser supports auto require , it will load dependencies itself as you can see here: http://jsfiddle.net/phusick/vr4h4/

2. Put the list of dependencies somewhere into your form template, eg in data-config attribute of your dijit/form/Form :

    <form data-dojo-type="dijit.form.Form" data-config='"deps":["dijit/form/Form", "dijit/form/TextBox", "dijit/form/Button"]'> <input data-dojo-type="dijit.form.TextBox" data-dojo-props="placeholder:'TextBox'"> <button data-dojo-type="dijit.form.Button">Button</button> </form> 

   Set parseOnLoad:false for the dijit/layout/ContentPane , load the template, get the list of dependencies, require them and then in the factory function parser.parse() containerNode of your ContentPane (see it in action http://jsfiddle.net/phusick/QA4gH/ ):

    require([ "dojo/ready", "dojo/dom", "dojo/query", "dojo/on", "dojo/parser", "dojo/json", "dijit/layout/ContentPane", "dojo/domReady!" ], function(ready, dom, query, on, parser, JSON) { var template, dijits; ready(function() { template = dom.byId("template").textContent; on.once(dom.byId("loadFormButton"), "click", loadForm); contentPane1.set("parseOnLoad", false); contentPane1.on("load", parseForm); }); function loadForm() { contentPane1.set("content", template); } function parseForm() { // a node to parse var node = contentPane1.containerNode; // obtain a list of dependencies var config = JSON.parse("{" + query("form", node)[0].dataset.config + "}"); // require (AMD load) dependencies require(config.deps, function() { // parse ContentPane content when dependencies are resolved dijits = parser.parse(node); console.log(dijits); // an array of instantiated dijits }); } });​ 

EDIT : I just got this idea that writing an auto require (for Dojo <1.8) is just about adding a short getDependencies() method, so you don't need to list dependencies as I mentioned in the second option above:

function getDependencies(/*DOMNode*/ containerNode) {
    var deps = [];
    query("[data-dojo-type]", containerNode).forEach(function(node) {
        var dep = node.dataset.dojoType.split(".").join("/");
        if(!~array.indexOf(deps, dep)) {
            deps.push(dep);
        };            
    });
    return deps;
}

See it working at jsFiddle: http://jsfiddle.net/phusick/hnjWt/

Answer 2

Only option you have is to set dojoConfig.async = false or set in the require statements in your code.

The modules are not loaded for this reason; require() does not block - and whilst it is still downloading modules - the parser runs.

See http://jsfiddle.net/zA9cJ/1/ for running sample of this

require(["dojox/layout/ContentPane", "dojo/domReady!"], function(pane) {

    var p = new pane({ parseOnLoad: true, executeScripts: true }, 'container');
    var content = '<script type="text/javascript">'+
        'require('+
        //////////////////////////
        '{async:false},'+ ////////
        //////////////////////////
        '["dijit/form/Button"]);'+
        '<'+'/script>'+
        '<div data-dojo-type="dijit.form.Button">Button</div>';
    p.set("content", content);
});​