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TiddlyWiki5/core/modules/tiddler.js

39 lines
803 B
JavaScript

/*\
title: $:/core/modules/tiddler.js
type: application/javascript
module-type: tiddlermethod
Extension methods for the $tw.Tiddler object
\*/
(function(){
/*jslint node: true, browser: true */
/*global $tw: false */
"use strict";
exports.hasTag = function(tag) {
return this.fields.tags && this.fields.tags.indexOf(tag) !== -1;
};
exports.hasField = function(field) {
return $tw.utils.hop(this.fields,field);
};
exports.getFieldString = function(field) {
var value = this.fields[field];
// Check for a missing field
if(value === undefined) {
return undefined;
}
// Parse the field with the associated module (if any)
var fieldModule = $tw.Tiddler.fieldModules[field];
if(fieldModule) {
return fieldModule.stringify.call(this,value);
} else {
return value.toString();
}
};
})();