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How js fills a string to a specified length

2025-04-05 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Development >

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This article mainly shows you "js how to fill a string to a specified length", the content is easy to understand, clear, hope to help you solve your doubts, the following let the editor lead you to study and learn "js how to fill a string to a specified length" this article.

How to fill a string to a specified length

Sometimes we want the string to have a specific length. If the string is too short, the remaining space needs to be filled until the specified length is reached.

In the past, the library left-pad was mainly used. Today, however, we can use the padStart and SpadEnd methods, depending on whether to populate the string at the beginning or end of the string.

/ / add "0" at the beginning until the length of the string is 8.

/ / add "0" at the beginning until the length of the string is 8. Const eightBits = '001'.padStart (8,' 0') console.log (eightBits) / / "00000001" / / add "*" at the end until the length of the string is 5. Const anonymizedCode = "34" .padEnd (5, "*") console.log (anonymizedCode) / / "34 strings filled *" above is all the content of the article "how to fill a string to a specified length by js". Thank you for reading! I believe we all have a certain understanding, hope to share the content to help you, if you want to learn more knowledge, welcome to follow the industry information channel!

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