LANGUAGE » JAVASCRIPT » UTILS

Miscellaneous

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JSON ​

js
// Object to JSON
var myObject = {field1: 'hello', field2: [1, 2, 3]};
var jsonString = JSON.stringify(myObject);

// JSON to Object
myObject = JSON.parse(jsonString);

Auto-scroll (no animation) ​

js
// Scroll body to element
var bodyElement = document.scrollingElement || document.body;
bodyElement.scrollTop = $('#element-id').offset().top;

// Scroll element with scroll to end
var tableElement = document.getElementById(elementId);
tableElement.scrollTop = tableElement.scrollHeight - tableElement.clientHeight;

Return new line according to OS ​

js
function newLine() {
    if (window.navigator.userAgent.indexOf('Windows NT') !== -1) {
        return '\r\n';
    }
    return '\n';
}

Save file generated by javascript ​

js
function saveTextFile(filename, content) {
    if (window.navigator.msSaveOrOpenBlob) {
        var blob = new Blob([content], {type: 'text/plain; charset=utf-8'});
        window.navigator.msSaveOrOpenBlob(blob, filename);
    }
    else {
        var element = document.createElement('a');
        element.setAttribute('href', 'data:text/plain; charset=utf-8,' + encodeURI(content));
        element.setAttribute('download', filename);
        element.style.display = 'none';
        document.body.appendChild(element);
        element.click();
        document.body.removeChild(element);
    }
}

Parse HTML entities ​

js
function parseHtmlEntities(str) {
    return str.replace(/&#([0-9]{1,3});/gi, function(match, numStr) {
        var num = parseInt(numStr, 10);
        return String.fromCharCode(num);
    }).replace(/"/g, '"').replace(/&/g, '&');
}