Qt Quick Underscore.js: Difference between revisions
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= Using Underscore.js library in Qt Quick = | |||
<blockquote>Underscore is a JavaScript library that provides a whole mess of useful functional programming helpers without extending any built-in objects. | |||
<blockquote>Underscore is a JavaScript library that provides a whole mess of useful functional programming helpers without extending any built-in objects. | (http://underscorejs.org/) | ||
</blockquote> | </blockquote> | ||
Unfortunately you cannot just import Underscore like: | Unfortunately you cannot just import Underscore like: | ||
<code>import "underscore.js" as Underscore</code> | |||
due [http://doc.qt.io/qt-5/qtqml-javascript-hostenvironment.html#javascript-environment-restrictions immutable root object] | |||
The workaround is to modify ''underscore.js'' so that it returned underscore object via special ''init'' function. | The workaround is to modify ''underscore.js'' so that it returned underscore object via special ''init'' function. | ||
This is a diff output for Underscore.js version 1.4.4:< | This is a diff output for Underscore.js version 1.4.4: | ||
<code> | |||
1,2c1,4 | |||
< // Underscore.js 1.4.4 | |||
< // = | |||
--- | --- | ||
> // Underscore.js 1.4.4 | |||
> // http://underscorejs.org | |||
> // (c) 2009-2013 Jeremy Ashkenas, DocumentCloud Inc. | |||
> // Underscore may be freely distributed under the MIT license. | |||
4,10c6,9 | 4,10c6,9 | ||
< // > http://underscorejs.org | |||
< // > (c) 2009-2013 Jeremy Ashkenas, DocumentCloud Inc. | |||
< // > Underscore may be freely distributed under the MIT license. | |||
< | |||
< // Baseline setup | |||
< // -------------- | |||
< var init = function() { | |||
--- | --- | ||
> (function() { | |||
> | |||
> // Baseline setup | |||
> // -------------- | |||
58,65c57,64 | 58,65c57,64 | ||
< // if (typeof exports ! 'undefined') { | |||
< // if (typeof module ! 'undefined' && module.exports) { | |||
< // exports = module.exports = _; | |||
< // } | |||
< // exports._ = _; | |||
< // } else { | |||
< // root._ = _; | |||
< // } | |||
--- | --- | ||
> if (typeof exports ! 'undefined') { | |||
> if (typeof module !== 'undefined' && module.exports) { | |||
> exports = module.exports = ''; | |||
> } | |||
> exports.'' = ''; | |||
> } else { | |||
> root.'' = ''; | |||
> } | |||
1227,1228c1226 | |||
< return''; | |||
< } | |||
— | |||
> }).call(this); | |||
</code> | |||
Now you can use it in your project:< | Now you can use it in your project: | ||
<code> | |||
import "underscore.js" as Underscore | |||
// … | |||
property var _: Underscore.init(); | |||
</code> | |||
Drawback of this approach is the following warning in application console: | Drawback of this approach is the following warning in application console: |
Latest revision as of 01:25, 24 March 2016
Using Underscore.js library in Qt Quick
Underscore is a JavaScript library that provides a whole mess of useful functional programming helpers without extending any built-in objects.
Unfortunately you cannot just import Underscore like:
import "underscore.js" as Underscore
The workaround is to modify underscore.js so that it returned underscore object via special init function.
This is a diff output for Underscore.js version 1.4.4:
1,2c1,4
< // Underscore.js 1.4.4
< // =
---
> // Underscore.js 1.4.4
> // http://underscorejs.org
> // (c) 2009-2013 Jeremy Ashkenas, DocumentCloud Inc.
> // Underscore may be freely distributed under the MIT license.
4,10c6,9
< // > http://underscorejs.org
< // > (c) 2009-2013 Jeremy Ashkenas, DocumentCloud Inc.
< // > Underscore may be freely distributed under the MIT license.
<
< // Baseline setup
< // --------------
< var init = function() {
---
> (function() {
>
> // Baseline setup
> // --------------
58,65c57,64
< // if (typeof exports ! 'undefined') {
< // if (typeof module ! 'undefined' && module.exports) {
< // exports = module.exports = _;
< // }
< // exports._ = _;
< // } else {
< // root._ = _;
< // }
---
> if (typeof exports ! 'undefined') {
> if (typeof module !== 'undefined' && module.exports) {
> exports = module.exports = '';
> }
> exports.'' = '';
> } else {
> root.'' = '';
> }
1227,1228c1226
< return'';
< }
—
> }).call(this);
Now you can use it in your project:
import "underscore.js" as Underscore
// …
property var _: Underscore.init();
Drawback of this approach is the following warning in application console: