Discover the proper way to implement dijit requires within a parsed Dojo ContentPane

Question

Discover the proper way to implement dijit requires within a parsed Dojo ContentPane

I am currently faced with a challenge: loading an HTML file that contains dijit.Form into a ContentPane. The catch is, I am unsure of which dijits will be required until the HTML is actually loaded. However, I know that the loaded HTML will contain necessary require statements to load them.

To tackle this issue, I am utilizing dojox.layout.ContentPane in order to execute the script from the loaded HTML. But here's the problem - when I set parseOnLoad to true, the parsing occurs before the script execution, meaning the dijits are not yet available during the initial content load. Additionally, even when using the onDownloadEnd callback, the dijits specified in the require statements are still not loaded at that point.

At this moment, the only solution I can think of is to utilize setTimeout to delay parsing until after the scripts have been executed. However, I am hesitant about this approach as it may not always be reliable and could potentially make the application less responsive.

So my question is, how can I ensure that the parsing happens right after the require statement from the loaded HTML has been successfully run?

javascript ajax dojo js-amd

Answer 1

Answer №1

There are two potential solutions that involve using dijit/layout/ContentPane:

If you are using Dojo 1.8.0, the parser supports auto require, which means it will load dependencies automatically. You can see an example of this in action here: http://jsfiddle.net/phusick/vr4h4/

Alternatively, you can include the list of dependencies within your form template, such as in the 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>

To implement this solution, set parseOnLoad:false for the dijit/layout/ContentPane, load the template, retrieve the list of dependencies, use require to load them, and then call the factory function parser.parse() on the containerNode of your ContentPane. You can see an example of this process here: 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) {
    
    // Implementation code goes here

});

EDIT: An alternative approach involves creating an auto-require mechanism (for Dojo <1.8) by adding a simple getDependencies() method. This method eliminates the need to manually list dependencies. See an example of this in action at jsFiddle: http://jsfiddle.net/phusick/hnjWt/

Answer 2

There are two potential solutions that involve using dijit/layout/ContentPane:

If you are using Dojo 1.8.0, the parser supports auto require, which means it will load dependencies automatically. You can see an example of this in action here: http://jsfiddle.net/phusick/vr4h4/

Alternatively, you can include the list of dependencies within your form template, such as in the 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>

To implement this solution, set parseOnLoad:false for the dijit/layout/ContentPane, load the template, retrieve the list of dependencies, use require to load them, and then call the factory function parser.parse() on the containerNode of your ContentPane. You can see an example of this process here: 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) {
    
    // Implementation code goes here

});

EDIT: An alternative approach involves creating an auto-require mechanism (for Dojo <1.8) by adding a simple getDependencies() method. This method eliminates the need to manually list dependencies. See an example of this in action at jsFiddle: http://jsfiddle.net/phusick/hnjWt/

Answer 3

Answer №2

To resolve this issue, you can either set dojoConfig.async to false or include the 'async: false' option in the require statements within your code.

The reason modules are not loading is because require() does not block execution while it is still downloading modules, causing the parser to run prematurely.

For a demonstration of this issue and a running sample, please refer to http://jsfiddle.net/zA9cJ/1/

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);
});

Answer 4

To resolve this issue, you can either set dojoConfig.async to false or include the 'async: false' option in the require statements within your code.

The reason modules are not loading is because require() does not block execution while it is still downloading modules, causing the parser to run prematurely.

For a demonstration of this issue and a running sample, please refer to http://jsfiddle.net/zA9cJ/1/

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);
});

Discover the proper way to implement dijit requires within a parsed Dojo ContentPane

Answer №1

Answer №2

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