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# import/no-dynamic-require: Forbid `require()` calls with expressions The `require` method from CommonJS is used to import modules from different files. Unlike the ES6 `import` syntax, it can be given expressions that will be resolved at runtime. While this is sometimes necessary and useful, in most cases it isn't. Using expressions (for instance, concatenating a path and variable) as the argument makes it harder for tools to do static code analysis, or to find where in the codebase a module is used. This rule checks every call to `require()` that uses expressions for the module name argument. ## Rule Details ### Fail ```js require(name); require('../' + name); require(`../${name}`); require(name()); ``` ### Pass ```js require('../name'); require(`../name`); ```