How to use the spreadElement function from @babel/types

Find comprehensive JavaScript @babel/types.spreadElement code examples handpicked from public code repositorys.

@babel/types.spreadElement is a method used in Babel to represent the spread operator ... in an abstract syntax tree (AST) for JavaScript code.

show.js

GitHub: peakchen90/babel-plugin-react-directives

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  }
  return false;
},
getResult(mergeItems) {
  return t.objectExpression([
    mergeItems.length > 0 && t.spreadElement(
      builder.buildCallRuntimeExpression(
        'merge-props.js',
        [
          t.stringLiteral('style'),

+ 11 other calls in file

babelPlugin.js

GitHub: caiwuu/Typex

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      if (t.isJSXAttribute(i)) {
        const name = convertAttrName(i)
        const value = convertAttrValue(i)
        return t.ObjectProperty(name, value)
      } else if (t.isJSXSpreadAttribute(i)) {
        return t.spreadElement(i.argument)
      }
    })
  )
}

How does @babel/types.spreadElement work?

@babel/types.spreadElement is a method used in Babel to represent the spread operator ... in an abstract syntax tree (AST) for JavaScript code. In JavaScript, the spread operator is used to spread the elements of an iterable object (such as an array) into a new array or function call. For example: arduino Copy code {{{{{{{ class="!whitespace-pre hljs language-arduino">const arr1 = [1, 2, 3]; const arr2 = [4, 5, 6]; const combinedArr = [...arr1, ...arr2]; console.log(combinedArr); // Output: [1, 2, 3, 4, 5, 6] In this code, we use the spread operator to combine the elements of arr1 and arr2 into a new array called combinedArr. When Babel processes JavaScript code, it generates an abstract syntax tree (AST) that represents the structure of the code. The AST is then transformed and reassembled to produce the output code. To represent the spread operator in the AST, Babel uses the @babel/types.spreadElement method. The @babel/types.spreadElement method takes an expression as its argument, which represents the iterable object being spread. For example: php Copy code {{{{{{{ class="!whitespace-pre hljs language-php">const t = require('@babel/types'); const iterable = t.identifier('myIterable'); const spreadElement = t.spreadElement(iterable); In this code, we use the t.identifier() method to create an identifier myIterable that represents the iterable object being spread. We then use the t.spreadElement() method to create a spread element that represents the spread operator applied to myIterable. The resulting spreadElement object can then be used in the AST to represent the spread operator in the code being transformed. Overall, @babel/types.spreadElement provides a way to represent the spread operator in the abstract syntax tree (AST) used by Babel to transform JavaScript code, making it possible to transform and transpile modern JavaScript features that are not yet widely supported by web browsers.

model.js

GitHub: disruptual/babel-plugin-react-directives

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return [
  t.variableDeclaration('let', [
    t.variableDeclarator(
      varId,
      t.arrayExpression([
        t.spreadElement(
          resolveExp
        )
      ])
    )

+ 5 other calls in file

index.js

GitHub: john024x/TiendaAvocado

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function convertAttribute(node) {
  const value = convertAttributeValue(node.value || t.booleanLiteral(true));

  if (t.isJSXSpreadAttribute(node)) {
    return t.spreadElement(node.argument);
  }

  if (t.isStringLiteral(value) && !t.isJSXExpressionContainer(node.value)) {
    value.value = value.value.replace(/\n\s+/g, " ");

+ 17 other calls in file

Ai Example

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const t = require("@babel/types");

const arr1 = t.identifier("arr1");
const arr2 = t.identifier("arr2");

const spreadElement1 = t.spreadElement(arr1);
const spreadElement2 = t.spreadElement(arr2);

const combinedArray = t.arrayExpression([spreadElement1, spreadElement2]);

console.log(combinedArray);

In this code, we use the @babel/types.spreadElement method to represent the spread operator in an AST for JavaScript code. We first create two identifiers arr1 and arr2, which represent the arrays being combined using the spread operator. We then use the t.spreadElement() method to create two spread elements spreadElement1 and spreadElement2, which represent the spread operator applied to arr1 and arr2 respectively. Finally, we use the t.arrayExpression() method to create a new array expression that includes the two spread elements. The resulting combinedArray object represents the JavaScript code [...arr1, ...arr2] in the AST, and can be used by Babel to transform and transpile the code for use in web browsers that do not yet support the spread operator. Note that this is just an example of how @babel/types.spreadElement can be used to represent the spread operator in an AST. In practice, Babel is typically used in conjunction with other tools and plugins to transform and transpile modern JavaScript features for use in web applications.

addToCypressConfigPlugin.js

GitHub: artgol996/Spinberry

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    };
}
exports.addToCypressConfigPlugin = addToCypressConfigPlugin;
function spreadResult(expr, toAdd) {
    return t.objectExpression([
        t.spreadElement(expr),
        toAdd,
    ]);
}
function isModuleExports(node) {

+ 4 other calls in file

convert.js

GitHub: Anthony-Nolan/babel-plugin-flow-runtime

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  }))));
};


converters.ObjectTypeSpreadProperty = function (context, path) {
  var arg = convert(context, path.get('argument'));
  return t.spreadElement(t.memberExpression(arg, t.identifier('properties')));
};


converters.ObjectTypeCallProperty = function (context, path) {
  var methodName = path.node.static ? 'staticCallProperty' : 'callProperty';

builder.js

GitHub: msinnes/dom

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objectExpression: properties => t.objectExpression(properties),
objectProperty: (key, value, computed, shorthand, decorators) => {
  const identifier = buildIdentifier(key);
  return t.objectProperty(identifier, value, computed, shorthand, decorators);
},
spreadElement: argument => t.spreadElement(argument),
stringLiteral: (value, extra) => {
  const stringLiteral = buildStringLiteral(value);
  if (extra) stringLiteral.extra = extra;
  return stringLiteral;

+ 5 other calls in file

Other functions in @babel/types

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@babel/types.identifier is the most popular function in @babel/types (20936 examples)

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