39 lines
No EOL
1.3 KiB
JavaScript
39 lines
No EOL
1.3 KiB
JavaScript
var jsonObj;
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/**
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* Reads the .json file and parses it to a JS object (jsonObj).
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* @param callback Asynchronous function.
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*/
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function loadJSON( callback ) {
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// new Http request object (asynchronous), both the web page and the XML file it tries to load, must be located on the same server.
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var xobj = new XMLHttpRequest();
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xobj.overrideMimeType( "application/json" );
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// Specifies the request
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/* method: the request type GET or POST
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url: the file location
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async: true (asynchronous) or false (synchronous)
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user: optional user name
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psw: optional password */
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xobj.open( 'GET', 'plain.json', true ); // Path to the file
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// Defines a function to be called when the readyState property changes
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xobj.onreadystatechange = function GetResponseText() {
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if( xobj.readyState == 4 && xobj.status == "200" ) {
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// Required use of an anonymous callback as .open will NOT return a value but simply returns undefined in asynchronous mode
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// Returns the response data as a string
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callback( xobj.responseText );
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}
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};
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// Sends the request to the server - Used for GET requests
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xobj.send( null );
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}
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loadJSON(
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function JSONparse( response ) {
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// Parse JSON string into object
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jsonObj = JSON.parse( response );
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console.log( jsonObj );
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}
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); |