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script-tag-data.js
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script-tag-data.js
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'use strict';
var ScriptTagData = ScriptTagData || (function() {
/**
* Private helper function to warn the user if the script wasn't found
*
* @param scriptId
* @private
*/
function _warnMessage(scriptId) {
console.warn('script tag with id [%s] could not be found', scriptId);
return null;
}
/**
* Returns all of the data attributes from a given script ID
*
* @param scriptId
* @param silent
* @returns {*}
*/
function getScript(scriptId, silent) {
var scripts = document.getElementsByTagName('script');
for (var i = 0, len = scripts.length; i < len; i++) {
var script = scripts[i];
var id = script.getAttribute('id');
if (id === scriptId) return scripts[i];
}
return silent ? null : _warnMessage(scriptId);
}
/**
* Returns the script tag based on the given script ID
*
* @param scriptId
* @param silent
* @returns {*}
*/
function getData(scriptId, silent) {
var script = getScript(scriptId, silent);
if (!script) {
return null;
}
var data = {};
var attributes = script.attributes;
for (var label in attributes) {
if (attributes.hasOwnProperty(label)) {
var node = attributes[label];
data[node.name.replace(/data-/g, '')] = node.value;
}
}
return data;
}
/**
* Returns functions 'getScript' and 'getData'
*/
return {
getScript: getScript,
getData: getData
};
}());