39 lines
995 B
JavaScript
39 lines
995 B
JavaScript
https://github.com/ariya/phantomjs/issues/10522#issuecomment-39248521
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var isFunction = function(o) {
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return typeof o == 'function';
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};
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var bind,
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slice = [].slice,
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proto = Function.prototype,
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featureMap;
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featureMap = {
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'function-bind': 'bind'
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};
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function has(feature) {
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var prop = featureMap[feature];
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return isFunction(proto[prop]);
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}
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// check for missing features
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if (!has('function-bind')) {
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// adapted from Mozilla Developer Network example at
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// https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Function/bind
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bind = function bind(obj) {
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var args = slice.call(arguments, 1),
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self = this,
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nop = function() {
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},
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bound = function() {
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return self.apply(this instanceof nop ? this : (obj || {}), args.concat(slice.call(arguments)));
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};
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nop.prototype = this.prototype || {}; // Firefox cries sometimes if prototype is undefined
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bound.prototype = new nop();
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return bound;
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};
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proto.bind = bind;
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} |