\u7b80\u5355\u7684\u89e3\u8bf4\u5982\u4f55\u4f7f\u7528 call, apply, bind.<\/p>\n
\r\n\r\nfunction func(y,z){\r\n \r\n console.log(this.x,y,z);\r\n \r\n}\r\n\r\nvar obj = {x:1};\r\n\r\n\r\n\/\/Use Call:\r\n\/\/(It executes right away)\r\n\/\/Output 1, undefined, undefined\r\n\r\nfunc.call(obj);\r\n\r\n\r\n\/\/Use Apply:\r\n\/\/(Same as call, but add one more argument of Array for the function's parameters)\r\n\/\/Output 1, 2, 3\r\n\r\nfunc.apply(obj,[2,3]);\r\n\r\n\r\n\/\/Use bind:\r\n\/\/(bind it as a new function, and execute in the future function call)\r\n\r\nvar boundFunc = func.bind(obj);\r\nboundFunc();\/\/Output 1, undefined, undefined\r\n\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"