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How to use the generate function from escodegen

Find comprehensive JavaScript escodegen.generate code examples handpicked from public code repositorys.

escodegen.generate is a JavaScript library that converts an Abstract Syntax Tree (AST) into a JavaScript code string.

task.js

GitHub: ui5-community/ui5-ecosystem-showcase

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						});
				}
			}
		},
	});
	return changed ? escodegen.generate(program) : content;
}

// utility to lookup unique XML dependencies
// eslint-disable-next-line jsdoc/require-jsdoc

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+ 6 other calls in file

domc_traversals.js

GitHub: SoheilKhodayari/JAW

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},
MemberExpression: function(node, recurse){
	// we only care about the member expression base objects
	// except when we have a `this.property` expression
	// where we are interested in the property part of the member expression
	let member_expression = escodgen.generate(node);
	if(member_expression.startsWith("this.")){ // handle ThisExpression
		member_expression = member_expression.replace('this.', '')
		let identifier_name = member_expression.substr(0, member_expression.indexOf('.'));
		if(!domcGlobalsModule.js_builtin.includes(identifier_name)){

+ 151 other calls in file

How does escodegen.generate work?

escodegen.generate is a JavaScript library function that generates a string of code from an abstract syntax tree (AST) of a JavaScript program, providing a way to programmatically create JavaScript code. It follows the ECMAScript standard and provides several options to customize the generated output, including formatting, semicolon insertion, and comment preservation. The resulting code can be used for code generation, code transformation, and code analysis purposes.

configurator.js

GitHub: t2ym/thin-hook

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// append service worker handler registration code
originalAst.body[0].expression.callee.body.body[0].alternate.alternate.body[4] = serviceWorkerHandlerRegistrationAst;
// append service worker registration code
originalAst.body[0].expression.callee.body.body[0].alternate.alternate.body[5] = serviceWorkerRegistrationAst;
_trimStartEndRaw(originalAst);
let minifiedCode = escodegen.generate(originalAst, { format: { compact: true } });
let minifiedAst = espree.parse(minifiedCode, espreeOptions);
_trimStartEndRaw(minifiedAst);
let originalAstJson = JSON.stringify(originalAst, null, 2);
let minifiedAstJson = JSON.stringify(minifiedAst, null, 2);

+ 5 other calls in file

browser.js

GitHub: longouyang/webppl

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}

function webpplCPS(code) {
  var programAst = esprima.parse(code);
  var newProgramAst = optimize(cps(thunkify(programAst)));
  return escodegen.generate(newProgramAst);
}

function webpplNaming(code) {
  var programAst = esprima.parse(code);

+ 11 other calls in file

Ai Example

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const esprima = require("esprima");
const escodegen = require("escodegen");

const code = "function add(a, b) { return a + b; }";
const ast = esprima.parseScript(code);

const generatedCode = escodegen.generate(ast);

console.log(generatedCode); // Outputs "function add(a, b) { return a + b; }"

In this example, we first parse a JavaScript function add into an AST using esprima.parseScript(). Then, we generate the original function back from the AST using escodegen.generate(). The output of the generated code is the same as the original function.

luna.js

GitHub: ccampbell/luna-testing

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    code: assertCode,
    file,
    position
},
left: {
    code: escodegen.generate(leftExpression, escodegenOptions),
    value: '{{LEFT_VALUE}}',
    range: leftExpression.range
},
value: '{{VALUE}}'

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+ 11 other calls in file

index.js

GitHub: unassert-js/unassertify

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  ecmaVersion: 'latest',
  locations: true,
  allowHashBang: true
});
const inMap = handleIncomingSourceMap(code);
const instrumented = escodegen.generate(unassertAst(ast, unassertOptions), {
  sourceMap: filepath,
  sourceContent: code,
  sourceMapWithCode: true
});

+ 3 other calls in file

buildSteps.js

GitHub: newlifewj/handow

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await fsp.writeFile( path.join(`${config._rootPath}`, "/stepBundles/stepLabels.json"), JSON.stringify(stepLabels) );

// TODO: inject "browser", "page" and "config" to step arguments, more??

// The result of building steps are 2 bundle objects, locateed in "/stepBundles/..."
const actsBundleScript = escodegen.generate(actsBundleEST);

// await wfPromise( path.join(`${config._rootPath}`, "/stepBundles/actsBundle.js"), actsBundleScript );
await fsp.writeFile( path.join(`${config._rootPath}`, "/stepBundles/actsBundle.js"), actsBundleScript );

+ 3 other calls in file

javascript.js

GitHub: decaffeinate-examples/codecombat

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    ast = escodegen.attachComments(ast, ast.comments, ast.tokens);
  } catch (e) {
    console.log('got error beautifying', e);
    ast = acorn_loose.parse_dammit(rawCode, {tabSize: 4, ecmaVersion: 5});
  }
  const beautified = escodegen.generate(ast, {comment: true, parse: esprima.parse});
  return beautified;
}

usesFunctionWrapping() { return false; }

build.js

GitHub: w781223592/vue2.0-note

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var object = {};
node.properties.forEach(function (prop) {
  if (!prop.key || prop.key.type !== 'Identifier') {
    return
  }
  var key = escodegen.generate(prop.key);
  var value = nodeToBinding(prop.value);
  if (key && value) {
    object[key] = value;
  }

+ 19 other calls in file

reactTemplates.js

GitHub: wix-incubator/react-templates

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        // to be removed when https://github.com/estools/escodegen/issues/263 will be fixed
        // remove also its test case "test/data/comment.rt.es6.js"
        if (options.modules !== 'es6') {
            tree = escodegen.attachComments(tree, tree.comments, tree.tokens)
        }
        return escodegen.generate(tree, {comment: true})
    } catch (e) {
        throw new RTCodeError(e.message, e.index, -1)
    }
}

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vm-shim.js

GitHub: mmpyw01/software-studio

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    lastNode.type = "ReturnStatement";
    lastNode.argument = lastNode.expression;
    delete lastNode.expression;
  }


  const rewrittenCode = escodegen.generate(ast, { comment: true });
  const suffix = options.filename !== undefined ? "\n//# sourceURL=" + options.filename : "";


  return Function("window", rewrittenCode + suffix).bind(contextifiedSandbox)(contextifiedSandbox);
};

+ 7 other calls in file

mutation.js

GitHub: aakriti0fnu/End-to-End-Pipeline

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let ast = await esprima.parse(buf, options)

await mutateFile(ast);

try {
    let code = await escodegen.generate(ast)
    let resp = await fs.writeFileSync(file, code)
} catch (e) {
    console.log("Compilation of code and write failed");
}

+ 4 other calls in file

uniffe.js

GitHub: manojpandey/hackenvision16

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  // drop use strict
  rootProgram.body = rootProgram.body.slice(1);
  // attach all leading comments from outside iffe
  rootProgram.leadingComments = ast.body[0].leadingComments;


  return escodegen.generate(rootProgram, {comment: true});
}


module.exports = function() {
  return through.obj(function(file, enc, cb) {

+ 8 other calls in file

mutation.js

GitHub: lionche/jitfunfuzz

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//                 }
//             },
//             leave: function (node, parent) {}
//         });
//         if(flag == 1) {
//             codegen = escodegen.generate(ast);
//             console.log(codegen);
//             console.log("replaceOperator");
//             console.log("------------------------------");
//         }

+ 34 other calls in file

jison.js

GitHub: fraczak/jiwson

$fraczak profile picture$

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        var labeled = JSONSelect.match(':has(:root > .label > .name:val("_token_stack"))', ast);


        labeled[0].body = stackAst;


        return escodegen.generate(ast).replace(/_token_stack:\s?/,"").replace(/\\\\n/g,"\\n");
    } catch (e) {
        return parseFn;
    }
}

+ 15 other calls in file

prettyprint.js

GitHub: klemmm/jsanalyzer

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	console.log("Reading input file...");
	const data = fs.readFileSync(process.argv[2]);
	console.log("Parsing JSON...");
	const json = JSON.parse(data);
	console.log("Generating JS...");
	const js = escodegen.generate(json, {comment: true}) + "\n";
	console.log("Writing to output file...");
	fs.writeFileSync(process.argv[3], js);
	console.log("All done!");
} catch (err) {

+ 9 other calls in file

pagejsunit.js

GitHub: yaniswang/pageJsUnit

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else if(checkUrlInclude(url, coverageInclude, coverageExclude)){
    if(coverageBeautify){
        try{
            var syntax = esprima.parse(responseContent, { raw: true, tokens: true, range: true, comment: true });
            syntax = escodegen.attachComments(syntax, syntax.comments, syntax.tokens);
            responseContent = escodegen.generate(syntax, 
                {
                    comment: true,
                    format: {
                        indent: {

+ 7 other calls in file

Other functions in escodegen

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escodegen.generate is the most popular function in escodegen (632 examples)

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