如何将 integer 数字与 JS 中的字符串分开？

Question

Sometimes in a HTML file, we have a <p> tag that shows the price of a product. For example the price is "1,200,000 Dollar" . Now a user added this product to the cart. I want that the webpage display the total price in the cart.

Now in JavaScript I want the program separate the number of price from string and put that in a variable. Here in the example that I said the <p> tag shows "1,200,000 Dollar" . Now I want to put just the number(in the example the number is 1,200,000 ) in a variable to calculate the total price later. What should I do?

Answer 1

You can also use a split function in this case.

const currencyString="1,000,000 Dollars";
const currencyNumber=Number(currencyString.split(' ')[0].replace(/,/g, ''));

Answer 2

Does the below answer your question...

var input = '1,200,000 Dollar';
var output = Number(input.replace(/[^0-9\-\.]/g, ''));

First we remove all non-digit characters with .replace method and then create a new Number value.

A few other usage examples:

 function stringToNumber(string) { return Number(string.replace(/[^0-9\-\.]/g, '')); } var inputs = [ '1,000,000 Dollars', '$1,000,000.50', '-50.12 USD' ]; for (var i = 0; i < inputs.length; i++) { console.log(inputs[i], stringToNumber(inputs[i])); }