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lotus
File size: 740 Bytes 
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'use strict';

const internals = {};


module.exports = function (input) {

    if (!input) {
        return '';
    }

    const lessThan = 0x3C;
    const greaterThan = 0x3E;
    const andSymbol = 0x26;
    const lineSeperator = 0x2028;

    // replace method
    let charCode;
    return input.replace(/[<>&\u2028\u2029]/g, (match) => {

        charCode = match.charCodeAt(0);

        if (charCode === lessThan) {
            return '\\u003c';
        }

        if (charCode === greaterThan) {
            return '\\u003e';
        }

        if (charCode === andSymbol) {
            return '\\u0026';
        }

        if (charCode === lineSeperator) {
            return '\\u2028';
        }

        return '\\u2029';
    });
};