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Javascript – How to write a Regex that targets the first match in each line only?

I want to copy past a huge list of properties rather than type them all out again. However I want to avoid copy their assignments.

The solution I’m trying involves a cmdF regex in VSCode. Then selecting all found matches.
Sample of typescript code.

    this.anchorBillingAddress = this.page.getByTestId('billing-address-section');
    this.anchorShippingAddress = this.page.getByTestId('shipping-address-section');
    this.anchorBilling = this.page.getByTestId('billing-section');
    this.anchorGeneral = this.page.getByTestId('general-section');
    this.anchorStatistics = this.page.getByTestId('statistics-section');

this[^s]+
is what I have tried. However it ends up copying the assignment as well. How do I make it stop at the first white space encountered in each line?

Tags:

2

Answers


  1. 0

    You can use s*b(this.[^;]+s*;) or s*b(this.[^;]+)s*;, which captures the entire line.

    const p = /s*b(this.[^;]+s*;)/gm;
const s = `    this.anchorBillingAddress = this.page.getByTestId(

'billing-address-section'

);
    this.anchorShippingAddress = this.page.getByTestId(

'shipping-address-section'

)

;
    this.anchorBilling = this.page.getByTestId('billing-section');
    this.anchorGeneral = this.page.getByTestId('general-section');
    this.anchorStatistics = this.page.getByTestId('statistics-section');`;

const matches = s.match(p);
if (matches) {
  matches.forEach((match, index) => {
    console.log(`${index}=> ${match}`);
  });
}

    Note:

    • s*: 0 or more space.
    • b: word boundary.
    • (this.[^;]+s*;): captures from this. to the end of the first ;, which I assume that’s what you want.
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  2. 0

    If you want it to stop at the first space, you can do this

    ^this[^s]+

    The ^ makes sure it’s from the start and won’t grab the second this.

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