javascript字串單引號與雙引號的區別

最近在使用javascript編程,遇到使用字串的情況

寫了一點測試代碼

        var str = 'This is Jack';        var str2 = "This is Tom";        var str3 = 'This is "Rose"';        var str4 = "This is 'LiLi'";        var str5 = "This is \"Sun\"";        var str6 = 'This is \'Mary\'';        var str7 = "This is \'Lucy\'";        var str8 = 'This is \"Rooney\"';        var str9 = 'This is \\Ronaldo\\';        console.log(str);        console.log(str2);        console.log(str3);        console.log(str4);        console.log(str5);        console.log(str6);        console.log(str7);        console.log(str8);        console.log(str9);

測試結果：

This is Jack
 This is Tom
This is "Rose"
 This is 'LiLi'
 This is "Sun"
 This is 'Mary'
This is 'Lucy'
This is "Rooney"
This is \Ronaldo\

結論：（1）只使用字元的字串，單引號和雙引號沒有區別

    （2）在單引號包括的字串中可以直接用雙引號，在雙引號包括的字串中可以直接用單引號

           （3）如果在雙引號包括的字串中用雙引號，需要用反斜線轉義，注意是"\"   ;同樣在單引號包括的字串中用單引號，也需要轉義

   （4）如果要用反斜線，則輸入‘\\’