我如何在if中更改全局变量的值

Question

My code does not work, help me please I want to call the function and let it run ON , and when I call it again, the OFF will be executed 我的代码不起作用，请帮我调用该函数，然后让它运行ON ，当我再次调用它时，将执行OFF

 var on = 1; function name () { if(on == 1){ alert('ON'); on = 0; }else if(on == 0){ alert('OFF'); on = 1; } } name(); name();

Answer 1

Maybe it's better if you use boolean values to avoid confusion 最好使用布尔值以避免混淆

 <html lang="es"> <head> <title>Helping people at StackOverflow</title> <script> window.onload = function(){ // Start global "on" var in false/true state var on = false; function name (){ if(on != true){ // Set on state on = true; /* Execute "on" code rules */ }else{ // Set off state on = false; /* Execute "off" code rules */ } console.log('Is "ON"?: ',on); } document.getElementById('btn').addEventListener('click',function(){ name(); }); } </script> </head> <body> <input id="btn" type="button" value='Ejecutar'> </body> </html>

我如何在if中更改全局变量的值

问题描述

1 个解决方案

解决方案1
0 2018-03-24 00:25:44

我如何在if中更改全局变量的值

问题描述

1 个解决方案

解决方案1 0 2018-03-24 00:25:44

解决方案1
0 2018-03-24 00:25:44