输入具有延迟功能的触发器，等待输入值改变

I'm building a angular directive, which on input value change runs a function, i want to wait 300ms before running this function, but if the value changes before the 300ms has gone, i need to reset the delay to 300ms. So only if value changes for 300ms then the function should run:I'm building a angular directive, which on inpu