我认为我是相当遥远,但我试图创建一个场景,在点击id 12a,我想提醒用户输入一个数字,并继续输入一个数字,直到他们用完了5个箭头。我哪里出错了?
var arrows = 5;
alert('You have ' + arrows + ' arrows!');
var shot = prompt('How many arrows would you like to shoot?', '1');
var shotten = parseInt(shot);
$('#12a').click(function(){
if(isNaN(shotten)){
alert('You must enter a valid number of arrows!');
} else if(shotten > arrows){
alert('Sorry, but there are only ' + arrows + ' arrows. You can not shoot ' + shotten + ' arrows!');
} else if(shotten < 0){
alert('Sorry, but you cannot shoot less than 0 arrows!');
} else {
arrows -= shotten;
alert('Now there are only ' + arrows + ' arrows!');
}
});
<p>There's a half-elf running at you. You can shoot him with your arrows if you'd like. </p>
<p>
<input type="submit" name="12a" id="12a" value="Let's do it.">
</p>发布于 2016-05-18 16:49:51
在使用JavaScript/webpage时,开发人员应该注意以下几点。
https://stackoverflow.com/questions/37299006
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