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Comments on Delete all occurrences of a character in a webpage with vanilla JavaScript

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Delete all occurrences of a character in a webpage with vanilla JavaScript

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Primarily for learning, I would like to try to delete a specific character (letter or number or special character), wherever it is in a webpage, with vanilla JavaScript.

The webpage won't change at all; it will stay almost the same but just without that character.


It doesn't matter where that character would appear:

  • In the start of a line
  • In the end of a line
  • Inside a word
  • Outside a word
  • Between two field separators (whitespaces/tabulations, etc.)

Wherever it will appear, it will be deleted.


What would be a vanilla JavaScript "brute force" tool to do so and how would you prefer to do so if asked by a client?

If I am not mistaken "Tree walker" is a JavaScript concept which should be useful here.

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2 comment threads

replace() on innerHTML (5 comments)
Some musings... (3 comments)
Some musings...
elgonzo‭ wrote over 2 years ago · edited over 2 years ago

Tree traversal is a general concept of visiting the nodes in a tree data structure -- it is not specific to JavaScript nor otherwise strongly associated with JavaScript.

Tree data structures and tree traversal are very often used in a multitude of different software written in a multitude of different languages using a multitude of different frameworks, so it sounds rather strange when you are calling it a "Javascript concept".

Since for the char replacement it is not really relevant in which order the nodes/HTML elements are visited, i guess it's up to you to choose a traversal strategy of your liking. And, performance considerations not withstanding, there is also the querySelectAll function which you could use to get all elements in the HTML document without requiring to write code for the DOM traversal, so depending on what you actually want to learn/practice, this function might (or might not) be a suitable option for realizing a solution to your task...

elgonzo‭ wrote over 2 years ago · edited over 2 years ago

[...] how would you prefer to do so if asked by a client?

That's not how this would happen in the real world. But anyway, i would do it in a way where i have (A) confidence that i will end up with a working and robust solution and (B) where have a good understanding of how much effort it will take me to implement, test, and (if required) later to maintain and update it in case the client's requirements change. And not to forget, risk management: There is always coming a point in the span of a contract project where the client (or sometimes you) realize that the requirements and functionality agreed upon are not what the client actually wants/needs or that the deliverable is incompletely specified, so you need to be able to adjust and adapt regardless of whatever "bullet-proof" implementation plan you had at the beginning of the project...

elgonzo‭ wrote over 2 years ago · edited over 2 years ago

Or, you know, you can do it like it often happens in business. You just bullshit your client, even if you can't write proper production code if your life depended on it. Being a (very) good salesman can compensate for such shortcomings more than enough. I.e., the time-tested "if you can't dazzle them with brilliance, baffle them with bullshit" tactic. It works, at least in the short term...