Some more Collections for jscodeshift for easy and terse api for writing Codemods
npm install jscodeshift-collections
const jscsCollections = require('jscodeshift-collections');
module.exports = function(fileInfo, api) {
const j = api.jscodeshift;
jscsCollections.registerCollections(j);
return j(fileInfo.source)
.findFunctionDeclarations('foo')
.renameTo('bar')
.toSource();
}Say for example, if you want to rename a function declaration foo to bar
j.findFunctionDeclarations('foo')
.renameTo('bar')function foo() {
}function bar() {
}// Find all function declarations
j.findFunctionDeclarations()
// Find all function declarations with name=foo and rename them to bar
j.findFunctionDeclarations('foo')
.renameTo('xyz');
// Find and remove params
j.findFunctionDeclarations('bar')
.removeParam('a');
// Find and add params
j.findFunctionDeclarations('bar')
.addParam('d');// Find all call expressions
j.findCallExpressions();
// Find all member expressions
j.findCallExpressions('foo.bar');
// Find all nested member expressions
j.findCallExpressions('foo.bar.baz');
// Find and rename call expressions
j.findCallExpressions('foo')
.renameTo('xyz');
// Find and rename member expressions
j.findCallExpressions('foo')
.renameTo('foo.bar');
// Find and remove params
j.findCallExpressions('bar')
.removeParam('a');
// Find and add params
j.findCallExpressions('bar')
.addParam('d');// Find all import declarations
j.findImportDeclarations();
// Find and rename
j.findImportDeclarations('a')
.renameTo('xyz');
// Find and remove specifiers
j.findImportDeclarations('a')
.removeSpecifier('a');
// Find and add specifiers
j.findImportDeclarations('a')
.addSpecifier('c');// Find all class declarations
j.findClassdeclarations();
// Find and rename
j.findClassDeclarations('foo').renameTo('bar')
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