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This time I will show you how to use JS to get the function parameter name, what are the precautions for using JS to get the function parameter name, the following is a practical case, let’s take a look .
When I was browsing webhak.com, I saw a method that can get the function parameter name through javaScript. I thought it used regular expressions very cleverly. I read it and wrote it down first. Maybe it will be useful in the future. .
function getArgs(func){ //匹配函数括号里的参数 var args=func.toString().match(/function\s.*?\(([^)]*)\)/)[1]; //分解参数成数组 return args.split(",").map(function (arg){ //去空格和内联注释 return arg.replace(/\/\*.*\*\//,"").trim(); }).filter(function(args) { //确保没有undefineds return args; }); }
With this method, we can write a test function to test it.
function test(agr1,arg2,arg3){ //这里是注释 /*这里也是注释*/ } console.log(getArgs(test));
I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!
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