How to use esotope-hammerhead - 10 common examples

condition: node => {
        // eval.(ctx, script, ...)
        if (node.arguments.length < 2)
            return false;

        if (node.callee.type === Syntax.MemberExpression && INVOCATION_FUNC_NAME_RE.test(node.callee.property.name)) {
            const obj = node.callee.object;

            // obj.eval.(), obj[eval].(),
            if (obj.type === Syntax.MemberExpression && (obj.property.value || obj.property.name) === 'eval')
                return true;

            // eval.()
            if (obj.name === 'eval')
                return true;
        }

        return false;
    },

condition: node => {
        if (node.callee.type === Syntax.MemberExpression && INVOCATION_FUNC_NAME_RE.test(node.callee.property.name)) {
            // postMessage.(ctx, script, ...)
            if (node.arguments.length < 2 && node.callee.property.name !== 'bind')
                return false;

            const obj = node.callee.object;

            // obj.postMessage.(), obj[postMessage].(),
            if (obj.type === Syntax.MemberExpression && (obj.property.value || obj.property.name) === 'postMessage')
                return true;

            // postMessage.()
            if (obj.name === 'postMessage')
                return true;
        }

        return false;
    },

condition: node => {
        // super.prop = value
        if (node.left.type === Syntax.MemberExpression && node.left.object.type === Syntax.Super)
            return false;

        return node.operator === '=' &&
               node.left.type === Syntax.MemberExpression && !node.left.computed &&
               node.left.property.type === Syntax.Identifier &&
               shouldInstrumentProperty(node.left.property.name);
    },

condition: (node, parent) => {
        if (node.name !== 'postMessage' || !parent)
            return false;

        // Skip: window.postMessage, postMessage.call
        if (parent.type === Syntax.MemberExpression)
            return false;

        // Skip: class X { postMessage () {} }
        if (parent.type === Syntax.MethodDefinition)
            return false;

        // Skip: class postMessage { x () {} }
        if (parent.type === Syntax.ClassDeclaration)
            return false;

        // Skip: function postMessage () { ... }
        if ((parent.type === Syntax.FunctionExpression || parent.type === Syntax.FunctionDeclaration) &&
            parent.id === node)
            return false;

        // Skip: function (postMessage) { ... } || function func(postMessage) { ... } || postMessage => { ... }

// Skip: const location = value;
        if (parent.type === Syntax.VariableDeclarator && parent.id === node)
            return false;

        // Skip: location = value || function x (location = value) { ... }
        if ((parent.type === Syntax.AssignmentExpression || parent.type === Syntax.AssignmentPattern) &&
            parent.left === node)
            return false;

        // Skip: function location() {}
        if ((parent.type === Syntax.FunctionExpression || parent.type === Syntax.FunctionDeclaration) &&
            parent.id === node)
            return false;

        // Skip: object.location || location.field
        if (parent.type === Syntax.MemberExpression)
            return false;

        // Skip: { location: value }
        if (parent.type === Syntax.Property && parent.key === node)
            return false;

        // Skip: location++ || location-- || ++location || --location
        if (parent.type === Syntax.UpdateExpression && (parent.operator === '++' || parent.operator === '--'))
            return false;

        // Skip: function (location) { ... } || function func(location) { ... } || location => { ... }
        if ((parent.type === Syntax.FunctionExpression || parent.type === Syntax.FunctionDeclaration ||
             parent.type === Syntax.ArrowFunctionExpression) && parent.params.indexOf(node) !== -1)
            return false;

        // Skip already transformed: __get$Loc(location)

condition: (node, parent) => {
        if (!parent)
            return false;

        // Skip: window.postMessage.field
        if (parent.type === Syntax.MemberExpression && (parent.property === node || parent.object === node))
            return false;

        // Skip: window.postMessage()
        if (parent.type === Syntax.CallExpression && parent.callee === node)
            return false;

        // Skip: window.postMessage = 1, window["postMessage"] = 1
        if (parent.type === Syntax.AssignmentExpression && parent.left === node)
            return false;

        // Skip already transformed: __get$PostMessage(window.postMessage), __get$PostMessage(window["postMessage"])
        if (parent.type === Syntax.CallExpression && parent.callee.type === Syntax.Identifier &&
            parent.callee.name === INSTRUCTION.getPostMessage)
            return false;

        // window.postMessage

condition: node => {
        const left = node.left;

        // super[prop] = value
        if (left.type === Syntax.MemberExpression && left.object.type === Syntax.Super)
            return false;

        if (node.operator === '=' && left.type === Syntax.MemberExpression && left.computed)
            return left.property.type === Syntax.Literal ? shouldInstrumentProperty(left.property.value) : true;

        return false;
    },

condition: node => {
        if (!node.arguments.length)
            return false;

        const callee = node.callee;

        // eval()
        if (callee.type === Syntax.Identifier && callee.name === 'eval')
            return true;

        // obj.eval(), obj['eval'](),
        return callee.type === Syntax.MemberExpression &&
               (callee.property.type === Syntax.Identifier && callee.property.name ||
                callee.property.type === Syntax.Literal && callee.property.value) === 'eval';
    },

return false;

        // object[prop] = value
        if (parent.type === Syntax.AssignmentExpression && parent.left === node)
            return false;

        // delete object[prop]
        if (parent.type === Syntax.UnaryExpression && parent.operator === 'delete')
            return false;

        // object[prop]++ || object[prop]-- || ++object[prop] || --object[prop]
        if (parent.type === Syntax.UpdateExpression && parent.operator === '++' || parent.operator === '--')
            return false;

        // object[prop]()
        if (parent.type === Syntax.CallExpression && parent.callee === node)
            return false;

        // new (object[prop])() || new (object[prop])
        if (parent.type === Syntax.NewExpression && parent.callee === node)
            return false;

        // for(object[prop] in source)
        if (parent.type === Syntax.ForInStatement && parent.left === node)
            return false;

        return true;
    },

// WARNING: this file is used by both the client and the server.
// Do not use any browser or node-specific API!
// -------------------------------------------------------------

import { createStringLiteral, createMethCallWrapper } from '../node-builder';
import { Syntax } from 'esotope-hammerhead';
import { shouldInstrumentMethod } from '../instrumented';

// Transform:
// obj.method(args...); obj[method](args...); -->
// _call$(obj, 'method', args...); _call$(obj, method, args...);

export default {
    nodeReplacementRequireTransform: true,

    nodeTypes: [Syntax.CallExpression],

    condition: node => {
        const callee = node.callee;

        if (callee.type === Syntax.MemberExpression) {
            if (callee.computed)
                return callee.property.type === Syntax.Literal ? shouldInstrumentMethod(callee.property.value) : true;

            return shouldInstrumentMethod(callee.property.name);
        }

        return false;
    },

    run: node => {
        const callee = node.callee;