javascript Uncaught SyntaxError: Unexpected token this Javasctript Error
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Uncaught SyntaxError: Unexpected token this Javasctript Error
提问by jatmdm
Trying to create an actor class for an html5 game, but I get an Uncaught SyntaxError. Not sure at all what it means or how to fix it. Other questions like this are usually about Jquery and I couldn't find any solutions that fit my problem.
试图为 html5 游戏创建一个 actor 类，但我得到一个 Uncaught SyntaxError。完全不知道这意味着什么或如何解决它。像这样的其他问题通常是关于 Jquery 的，我找不到任何适合我的问题的解决方案。
function Actor(x, y){
//...
this.direction = 270;
//...
}
Actor.prototype.update = function(){
if(this.speed >= this.maxspeed)
this.speed = this.maxspeed;
if(Key.isDown(Key.getCode("a")) this.direction -= 1; // < -- ERROR OCCURS HERE
if(Key.isDown(Key.getCode("d")) this.direction +=1;
if(Key.isDown(Key.getCode(" ") this.move();
}
回答by hchau
You're missing a closing parentheses in all your if statements. They should be
您在所有 if 语句中都缺少右括号。他们应该是
if(Key.isDown(Key.getCode("a"))) this.direction -= 1;
if(Key.isDown(Key.getCode("d"))) this.direction +=1;
if(Key.isDown(Key.getCode(" "))) this.move();
回答by Alex Wayne
if(Key.isDown(Key.getCode("a")) this.direction -= 1;
You have 3 opening parens, and only 2 closing ones.
你有 3 个开括号，只有 2 个闭括号。
if(Key.isDown(Key.getCode("a"))) this.direction -= 1;
// ^ added
You have multiple lines with this same problem. Correct them all.
您有多条线路有同样的问题。全部纠正。
