When using Less.js with IE8, an error may occur: "Object does not support property or method 'bind'"

Question

When using Less.js with IE8, an error may occur: "Object does not support property or method 'bind'"

During my cross-browser testing on IE Edge in IE8 mode, the page fails to display correctly due to a Less JS (v2.7.1) error. The console log shows:

SCRIPT438: Object doesn't support property or method 'bind' File: less.js, Line: 1896, Column: 1

The same issue occurs with the minified version: SCRIPT438: Object doesn't support property or method 'bind' File: less.min.js, Line: 13, Column: 27226

I have learned that bind is not supported by IE8 and below, which is causing this problem.

Is there a solution that can help me resolve this without having to remove Less JS entirely (which is not an option)?

javascript internet-explorer-8 less bind ie8-browser-mode

Answer 1

Answer №1

If you need to use the bind method but it's not supported in your environment, you can implement a polyfill like the one provided by MDN. Keep in mind that there are some differences compared to the native implementation.

if (!Function.prototype.bind) {
    Function.prototype.bind = function(oThis) {
       if (typeof this !== 'function') {
       // closest thing possible to the ECMAScript 5
       // internal IsCallable function
       throw new TypeError('Function.prototype.bind - what is trying to be bound is not callable');
    }

    var aArgs   = Array.prototype.slice.call(arguments, 1),
        fToBind = this,
        fNOP    = function() {},
        fBound  = function() {
            return fToBind.apply(this instanceof fNOP
                   ? this
                   : oThis,
                   aArgs.concat(Array.prototype.slice.call(arguments)));
        };

    if (this.prototype) {
        // Function.prototype doesn't have a prototype property
        fNOP.prototype = this.prototype; 
    }
    fBound.prototype = new fNOP();

    return fBound;
};

}

Answer 2

If you need to use the bind method but it's not supported in your environment, you can implement a polyfill like the one provided by MDN. Keep in mind that there are some differences compared to the native implementation.

if (!Function.prototype.bind) {
    Function.prototype.bind = function(oThis) {
       if (typeof this !== 'function') {
       // closest thing possible to the ECMAScript 5
       // internal IsCallable function
       throw new TypeError('Function.prototype.bind - what is trying to be bound is not callable');
    }

    var aArgs   = Array.prototype.slice.call(arguments, 1),
        fToBind = this,
        fNOP    = function() {},
        fBound  = function() {
            return fToBind.apply(this instanceof fNOP
                   ? this
                   : oThis,
                   aArgs.concat(Array.prototype.slice.call(arguments)));
        };

    if (this.prototype) {
        // Function.prototype doesn't have a prototype property
        fNOP.prototype = this.prototype; 
    }
    fBound.prototype = new fNOP();

    return fBound;
};

}

When using Less.js with IE8, an error may occur: "Object does not support property or method 'bind'"

Answer №1

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