javascript Javascript将+1添加到字符串
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Javascript add +1 to string
提问by htmlcoder123
I have a variable that stores a innerHTML text in it
我有一个变量在其中存储了一个innerHTML文本
var text = document.getElementById("textID").innerHTML; // <-- textID is actually a number
The "text" is actually just a number but I guess javascript still thinks it's a string.
“文本”实际上只是一个数字，但我猜 javascript 仍然认为它是一个字符串。
I want to add + 1 to the variable text, but it just adds a new letter instead of increasing the number
我想在变量文本中添加 + 1，但它只是添加了一个新字母而不是增加数字
For example : 0 + 1 = 01 --> 01 + 1 = 011 and so on...
例如：0 + 1 = 01 --> 01 + 1 = 011 等等...
Here's the code I tried this with:
这是我尝试过的代码：
text = text + 1;
How can I make it so it increases the number instead of adding new letters? (1+1 = 2, etc)
我怎样才能使它增加数字而不是添加新字母？（1+1 = 2，以此类推）
回答by Griffith
Under the assumption that you are absolutely sure that the number is a decimal integer. Either
假设您绝对确定该数字是十进制整数。任何一个
text = +text + 1;
Or
或者
text = parseInt(text, 10) + 1;
Or
或者
text = Number(text) + 1;
