在声明之前调用 JavaScript 函数

Question

I have this function inside test.js :

function testing(){
  document.write("<p>Tes1</p>");
}

And then a basic HTML page.

Is it possible to call the function before being declared and add this to the page?

<p>Test1</p>

Because if I include the test.js at the bottom of the page, it's not working. Is there a way to make it work (with a JavaScript file being included at the bottom of the HTML page)?

Answer 1

把你的testing()函数调用放在window.onload回调中，就像这样，

window.onload = function(){ testing(); }