4個空格縮進，最好統一tab為4個字符。

結尾分號

//原始代碼function getData() {
 return 
 {
 title:"Maintainable JavaScript",
 author:"Nicholas C. Zakas"
 }//分析器會它理解function getData() {
 return;
 {
 title:"Maintainable JavaScript",
 author:"Nicholas C. Zakas"
 };
}

//這段代碼工作正常，盡管沒有用分號function getData() {
 return {
 title:"Maintainable JavaScript",
 author:"Nicholas C. Zakas
 }
}

80個字符

通常我們會在運算符后換行，下一行會增加兩個層級的縮進（8個字符）

var result = something + antherThing + yetAnotherThing + somethingElse + 
 anotherSomethingElse;

4個空格縮進，最好統一tab為4個字符。

結尾分號

//原始代碼function getData() {
 return 
 {
 title:"Maintainable JavaScript",
 author:"Nicholas C. Zakas"
 }//分析器會它理解function getData() {
 return;
 {
 title:"Maintainable JavaScript",
 author:"Nicholas C. Zakas"
 };
}

//這段代碼工作正常，盡管沒有用分號function getData() {
 return {
 title:"Maintainable JavaScript",
 author:"Nicholas C. Zakas
 }
}

80個字符

通常我們會在運算符后換行，下一行會增加兩個層級的縮進（8個字符）

var result = something + antherThing + yetAnotherThing + somethingElse + 
 anotherSomethingElse;