JavaScript hint()命令 [英] JavaScript prompt() command

问题描述

我刚刚了解了hint()命令；我知道，hint()命令以字符串形式返回用户输入.我搞砸了下面的程序，并输入了每个"Dead" Ohlin 作为男性名字.为什么这项工作没有引起任何问题?每死"的Ohlin ..."应该引起了问题.解释器是否通过在引号之前放置转义字符来自动解决此问题?

I just learned about the prompt() command; I know that the prompt() command returns user input in the form of a string. I was messing with the program below, and I typed in Per "Dead" Ohlin for the male name. Why did this work and not cause any problems? "Per "Dead" Ohlin..." should have caused a problem. Does the interpreter automatically fix this by putting an escape character before the quotation marks?

let nameOfTheKiller = prompt("Type in a male name.");
let nameOfTheVictim = prompt("Type in a female name.");
let nameOfDrug = prompt("Type in the name of a drug.");
let nameOfAlchoholicBeverage = prompt("Type in the name of an alchoholic beverage.");
let story = nameOfTheKiller   
story += " went to a diner, met " 
story += nameOfTheVictim + ", and asked her to hangout."  
story += " She said yes, so " + nameOfTheKiller + " took her home. As soon as they arrived to " 
story += nameOfTheKiller + " relax-location, " + nameOfTheKiller 
story += " pulled out " + nameOfDrug + " and " + nameOfAlchoholicBeverage + ". " 
story += nameOfTheKiller + " and " + nameOfTheVictim 
story += " started using the party favors and got really high and drunk. The party favors gave " 
story += nameOfTheKiller + " auditory halucinations that comanded him to kill " 
story += nameOfTheVictim + ", so he did." ;


alert("We are done asking you questions. We are generating a story for you. The story will be finished, shortly.");
document.write(story) ;

推荐答案

提示不是 eval -传递给它的任何内容都将解释为字符串.输入

prompt is not eval - whatever you pass to it will be interpreted as a string. Typing in

Per "Dead" Ohlin

此行运行时

let nameOfTheKiller = prompt("Type in a male name.");

就像在做

let nameOfTheKiller = `Per "Dead" Ohlin`;

您在输入的字符串中包含的任何字符也恰好也是Javascript中的有效字符串定界符，将被解释为这些文字字符(("，'，反引号)，而不是用作分隔符.

Any characters you include in the string you enter which happen to also be valid string delimiters in Javascript will be interpreted as those literal characters (", ', backtick), rather than as delimiters.

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