如何在 JavaScript 中的 onclick 之后立即执行 function？

Question

I want to change the caret position whenever the user clicks the mouse within a textbox. This is because I want to disable the possibility of the user changing the caret position; it has to stay constant and unchangeable.

But it seems that the function that onclick triggers is first executed about 0.3 seconds after the onclick actually occurs. There is a delay.

    input.onclick = function(){
        input.setSelectionRange(0, 0);
    }

input is the variable for the input field.

Answer 1

You might find more control with mouse events by also using the onmousedown event. onclick waits until the mouse button comes up. By the looks of it, could basically copy/paste another copy of this code, and just change onclick to onmousedown .