通过html按钮更改变量 [英] Changing variable by html button

问题描述

我正在学习javascript，因此决定创建简单的Rock，Paper，剪刀游戏.我想通过按钮来控制它.所以我用html做的:

I'm learning javascript and I decided to create simple Rock, Paper, Scissors game. I want to make it controllable by buttons. So I made this in html:

<div id="game">
    <button onClick="user(rock)">Rock</button>
    <button onClick="user(paper)">Paper</button>
    <button onClick="user(scissors)">Scissors</button>
    <div id="result"></div>
    <br>
    <br>
    <button onClick="test()">DEBUG</button>
</div>

，并将其保存在.js文件中.

and this in .js file.

var user = "none";
function user(choice){
    var user = choice;
}

function test(click){
    alert("You chose " + user);
}

因此，我认为单击摇滚"按钮后，它将把var用户更改为摇滚，但没有.单击岩石，然后单击调试"按钮后，显示您什么都没选".

So I thought that after I click Rock button it will change var user to rock but it doesn't. After I click rock and then Debug button I get "You chose none".

推荐答案

<div id="game">
    <button onClick="choose('rock')">Rock</button>
    <button onClick="choose('paper')">Paper</button>
    <button onClick="choose('scissors')">Scissors</button>
    <div id="result"></div>
    <br>
    <br>
    <button onClick="test()">DEBUG</button>
</div>

和

var user;
function choose(choice){
    user = choice;
}

function test(click){
    alert("You chose " + user);
}                         

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