Replace HTML attribute value inside a string in nodeJS

Question

I have a large string with HTML tags which is store in mongodb. Now I only want replace the maxlength value. Using Jquery It's easy way to do this by $(string) you will get html object and before update in database we can use .html() but how we can do this in NodeJs.

<textarea maxlength="20" class="form-control component_label_input" data-component_html="true" data-component_name="attributes" data-component_attribute="script" rows="5">

Any help would be really appreciated.

Thanks in Advance.

what about setAttribute in plain old JavaScript? w3schools.com/jsref/met_element_setattribute.asp — versvs
– versvs, Commented Feb 22, 2018 at 11:35

Gorka Hernandez · Accepted Answer · 2018-02-22 11:35:32Z

3

You can use RegExp:

const sample = '<textarea maxlength="20" class="form-control component_label_input" data-component_html="true" data-component_name="attributes" data-component_attribute="script" rows="5">';

const newString = sample.replace(/maxlength="\d+"/, 'maxlength="' + 50 + '"');

console.log(newString);

To make it a bit more reusable, you can abstract the login into a function:

function updateMaxlength(elementString, newLength) {
    return elementString.replace(/maxlength="\d+"/, `maxlength="${newLength}"`);
}

const sample = '<textarea maxlength="20" class="form-control component_label_input" data-component_html="true" data-component_name="attributes" data-component_attribute="script" rows="5">';

const newString = updateMaxlength(sample, 50);

console.log(newString);

edited Feb 22, 2018 at 11:35

answered Feb 22, 2018 at 11:31

Gorka Hernandez

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1 Comment

Anil Yadav Over a year ago

Thanks Buddy I was thinking the same

Javier Criado · Accepted Answer · 2024-01-22 22:18:33Z

0

const str = '<textarea maxlength="20" class="form-control component_label_input" data-component_html="true" data-component_name="attributes" data-component_attribute="script" rows="5">';

const newLength = 100;//or whatever value you want

str = str.replace(/maxlength="[^"]*"/, `maxlength="${newLength}"`);

edited Jan 22, 2024 at 22:18

answered Jan 22, 2024 at 22:17

Javier Criado

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1 Comment

GʀᴜᴍᴘʏCᴀᴛ Over a year ago

It's a good practice to explain your code instead of code dumping.

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