Скачать или смотреть ✂️ Extracting Sub-Strings In JavaScript Using SubString, Substr and Slice 🔪

Manipulating data is an important part of any application. As JavaScript has gained more market share the need to use the language to parse and extract data has risen.

pizza-sliceJavaScript has native members of the String object to help extract sub-strings based on character position: substring, substr and slice. Each return a string, extracted from an initial string based on start position and a length.

On the surface they look almost identical, but have some subtle differences.

substring(indexStart[, indexEnd]): returns the part of the string between the start and end indexes, or to the end of the string.
substr(start[, length]): returns the part of a string between the start index and a number of characters after it.
slice(beginIndex[, endIndex]): extracts a section of a string and returns it as a new string.

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