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estree-util-is-identifier-name
Advanced tools
Check if something can be an ecmascript (javascript) identifier name
estree utility to check if something can be an identifier.
This package is a utility that can be used to check if something can be an
identifier name.
For example, a
, _
, and a1
are fine, but 1
and -
are not.
You can use this utility when generating IDs from strings or parsing IDs.
This package is ESM only. In Node.js (version 12.20+, 14.14+, 16.0+, or 18.0+), install with npm:
npm install estree-util-is-identifier-name
In Deno with esm.sh
:
import * as isIdentifierName from 'https://esm.sh/estree-util-is-identifier-name@2'
In browsers with esm.sh
:
<script type="module">
import * as isIdentifierName from 'https://esm.sh/estree-util-is-identifier-name@2?bundle'
</script>
import {name, start, cont} from 'estree-util-is-identifier-name'
name('$something69') // => true
name('69') // => false
name('var') // => true (this does not handle keywords)
start(48) // => false (character code for `0`)
cont(48) // => true (character code for `0`)
This package exports the identifiers name
, start
, and cont
.
There is no default export.
name(value)
Checks if value
(string
) is a valid identifier name (boolean
).
start(code)
Checks if the given character code (number
) can start an identifier
(boolean
).
cont(code)
Checks if the given character code (number
) can continue an identifier
(boolean
).
This package is fully typed with TypeScript. It exports no additional types.
Projects maintained by the unified collective are compatible with all maintained versions of Node.js. As of now, that is Node.js 12.20+, 14.14+, 16.0+, and 18.0+. Our projects sometimes work with older versions, but this is not guaranteed.
goto-bus-stop/estree-is-identifier
— check if an AST node is an identifierSee contributing.md
in syntax-tree/.github
for
ways to get started.
See support.md
for ways to get help.
This project has a code of conduct. By interacting with this repository, organization, or community you agree to abide by its terms.
FAQs
Check if something can be an ecmascript (javascript) identifier name
The npm package estree-util-is-identifier-name receives a total of 2,664,971 weekly downloads. As such, estree-util-is-identifier-name popularity was classified as popular.
We found that estree-util-is-identifier-name demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 2 open source maintainers collaborating on the project.
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