Useful core Javascript modules: Difference between revisions
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<code javascript> | <code javascript> | ||
require(['core/config’], function(mdlcfg) { | require(['core/config’], function(mdlcfg) { | ||
console.log(mdlcfg.wwwroot); // outputs the wwwroot of moodle to console | |||
}); | }); | ||
</code> | </code> | ||
Revision as of 06:39, 27 September 2016
Moodle 2.9
Configuration settings (core/config)
Example of using config module:
require(['core/config’], function(mdlcfg) {
console.log(mdlcfg.wwwroot); // outputs the wwwroot of moodle to console
});
Language strings (core/str)
Example of using language strings module (retrieved via ajax, if the string is not yet loaded)
require([‘core/str’], function(str) {
str.get_string('edita', 'core', stringargument).done(function(s) {
console.log(s);
}).fail(console.log(e));
});
The string will be retrieved via AJAX request on the first use and cached in browser local storage until purge caches or site upgrade
IT IS NOT RECOMMENDED to call:
$PAGE->requires->string_for_js('edita', 'core'); // You do not need this!
Because:
- The list of strings used now needs to be maintained in 2 places
- The strings are always sent, and bloat the page size even if they are not used
- All strings fetched via the AJAX method above are cached in browser local storage anyway, so these strings will never be used 99% of the time
Notifications (core/notification)
Examples:
require(['core/notification’], function(notification) {
notification.alert('Hello', 'Welcome to my site!', 'Continue');
});
Strings and notifications:
require(['core/str', 'core/notification’], function(str, notification) {
str.get_strings([
{'key' : 'delete'},
{'key' : 'confirmdeletetag', component : 'tag'},
{'key' : 'yes'},
{'key' : 'no'},
]).done(function(s) {
notification.confirm(s[0], s[1], s[2], s[3], function() {
window.location.href = href;
});
}
).fail(notification.exception);
});
URL module (core/url)
require(['core/url'], function(url) {
url.fileUrl(relativeScript, slashArg);
url.relativeUrl(relativePath);
url.imageUrl(imagename, component);
});
Tree (core/tree)
Moodle 3.1
If you want to add a hierarchical interface, you should use the tree module. It will handle user interaction and accessibility for you.
define(['jquery', 'core/tree'], function($, Tree) {
return {
init: function() {
new Tree("css/jquery selector of the tree container");
}
};
});
Read more about the Tree module
