做
var old = /*value*/
function loop(){
if (/*value*/ != old){ //check if the value is not old
//do stuff
}
old = /*value*/ //set old to value
requestAnimationFrame(loop) //loop every frame
}
requestAnimationFrame(loop) //wait a frame
或
var old = /*value*/
function changed(){
var change = /*value*/ != old //check if the value is not old
old = /*value*/ //set old to value
return change //output change
}
並將 /*value*/ 替換為要檢查的值:)
以上是如何檢查 javascript webbrowser 中的值是否已更改的詳細內容。更多資訊請關注PHP中文網其他相關文章！
