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public javascript v1 · immutableObject.prototype.getElementByClassName = function (classname) { var nodes = this.childNodes; for (var i = 0;i < nodes.length;i++) { if (nodes[i].className == classname) return nodes[i]; }}Object.prototype.getElementByClassName = function (classname) { var nodes = this.childNodes; for (var i = 0;i < nodes.length;i++) { if (nodes[i].className == classname) return nodes[i]; }}