Looking to see how I can split a string into two parts, while keeping full words intact

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As the title says, looking to see how I can split a string into two parts, while keeping full words intact, and having access to both parts with JavaScript. I am using this string in a pug file.

For instance, I have a very long string

let str = `hello i am a very long string that needs to be split into two different parts! thank you so much for helping.'

I want the first 70 characters, to use as a headline, then the rest to use for the body of the element.

I have used this regex that I found on an older post that gives me the first 70+ characters, with full words...

str.replace(/^([\s\S]{70}[^\s]*)[\s\S]*/, "$1")

which does what I want it to do. But now I need to figure out if there is a way to get the rest of that string?

str1 = `hello i am a very long string that needs to be split into two different`
str2 = `parts! thank you so much for helping.`

Again, using this in a pug file, so if there is a simple answer, I would love that. Otherwise I suppose I could just write a function and import the script to the pug view.

react code

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