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| title | chunk | source | category | tags | date_saved | instance |
|---|---|---|---|---|---|---|
| Binding - Glossary | MDN | 1/3 | https://developer.mozilla.org/en-US/docs/Glossary/Binding | reference | web, html, css, javascript, documentation | 2026-05-05T05:25:07.660461+00:00 | kb-cron |
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Binding
In programming, a binding is an association of an identifier with a value. Not all bindings are variables — for example, function parameters and the binding created by the catch (e) block are not "variables" in the strict sense. In addition, some bindings are implicitly created by the language — for example, this and new.target in JavaScript.
A binding is mutable if it can be re-assigned, and immutable otherwise; this does not mean that the value it holds is immutable.
A binding is often associated with a scope. Some languages allow re-creating bindings (also called redeclaring) within the same scope, while others don't; in JavaScript, whether bindings can be redeclared depends on the construct used to create the binding.