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How to use the isNull function from lodash

Find comprehensive JavaScript lodash.isNull code examples handpicked from public code repositorys.

lodash.isNull is a function that checks if a given value is null.

astrobench.js

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 * @example
 *
 * _.isNull(null);
 * // => true
 *
 * _.isNull(undefined);
 * // => false
 */
function isNull(value) {
  return value === null;

711

+ 3 other calls in file

browser-options.js

GitHub: gemini-testing/hermione

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desiredCapabilities: option({
    defaultValue: defaults.desiredCapabilities,
    parseEnv: JSON.parse,
    parseCli: JSON.parse,
    validate: (value, config) => {
        if (_.isNull(value) && _.isNull(config.desiredCapabilities)) {
            throw new Error('Each browser must have "desiredCapabilities" option');
        } else {
            utils.assertOptionalObject(value, 'desiredCapabilities');
        }

556

+ 2 other calls in file

How does lodash.isNull work?

lodash.isNull is a function from the Lodash library that checks if a value is null. It returns true if the value is null, and false otherwise. Internally, the function uses the === operator to check if the value is null, which is a strict equality check that returns true only if the two operands are of the same type and have the same value.

lodash-contrib.commonjs.js

GitHub: node4good/lodash-contrib

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module.exports.isMatchWith         = _.isMatchWith;
module.exports.isNaN               = _.isNaN;
module.exports.isNative            = _.isNative;
module.exports.isNegative          = _.isNegative;
module.exports.isNil               = _.isNil;
module.exports.isNull              = _.isNull;
module.exports.isNumber            = _.isNumber;
module.exports.isNumeric           = _.isNumeric;
module.exports.isObject            = _.isObject;
module.exports.isObjectLike        = _.isObjectLike;

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+ 92 other calls in file

generic.js

GitHub: polymorpher/ens-registrar-relay

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const appConfig = require('../../config')
const _ = require('lodash')


const mergeNonEmpty = (a, b) => {
  return _.mergeWith(a, b, (original, newValue) => {
    if (_.isUndefined(newValue) || _.isNull(newValue) || _.isNaN(newValue)) {
      return original
    }
    return undefined
  })

+ 10 other calls in file

Ai Example

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const _ = require("lodash");

console.log(_.isNull(null)); // Output: true
console.log(_.isNull(undefined)); // Output: false
console.log(_.isNull("")); // Output: false
console.log(_.isNull(0)); // Output: false

In this example, we're using lodash.isNull to check if various values are null or not. The function returns true if the value is null, and false otherwise.

helloworld.js

GitHub: mwarman/hello-lambda-nodejs

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lodash.js

GitHub: mdmarufsarker/lodash

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console.log(isNative); // => true


const isNil = _.isNil(null);
console.log(isNil); // => true


const isNull = _.isNull(null);
console.log(isNull); // => true


const isNumber = _.isNumber(1);
console.log(isNumber); // => true

+ 15 other calls in file

user.js

GitHub: itw-creative-works/backend-manager

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// https://stackoverflow.com/a/26202058/7305269
function pruneObject(obj) {
  return function prune(current) {
    _.forOwn(current, function (value, key) {
      if (_.isUndefined(value) || _.isNull(value) || _.isNaN(value) ||
        (_.isObject(value) && _.isEmpty(prune(value)))) {


        delete current[key];
      }

+ 4 other calls in file

path-rewriter.js

GitHub: dewbian/blot_2023

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  return true
} else if (!_.isEmpty(rewriteConfig) && _.isPlainObject(rewriteConfig)) {
  return true
} else if (
  _.isUndefined(rewriteConfig) ||
  _.isNull(rewriteConfig) ||
  _.isEqual(rewriteConfig, {})
) {
  return false
} else {

salaryStructure.js

GitHub: connexxiontelecom/ircihumanebackend

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} else {
    const empSalaryGrade = await salaryGrade.findSalaryGrade(salaryStructureRequest.ss_grade).then((data) => {
        return data
    })

    if (_.isEmpty(empSalaryGrade) || _.isNull(empSalaryGrade)) {
        return res.status(400).json(`Salary Grade Doesn't Exists`)
    } else {
        let maximum = parseFloat(empSalaryGrade.sg_maximum)
        let minimum = parseFloat(empSalaryGrade.sg_minimum)

+ 74 other calls in file

utils.js

GitHub: krieit/Node-vogels

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var utils = module.exports;


utils.omitNulls = function (data) {
  return _.omitBy(data, function(value) {
    return _.isNull(value) ||
      _.isUndefined(value) ||
      (_.isArray(value) && _.isEmpty(value)) ||
      (_.isString(value) && _.isEmpty(value));
  });

helper.js

GitHub: syed-ib/CloudWise-OpenSource-FlyFish

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  return {
    userId: _.isNull(userCookie) || _.isUndefined(userCookie.userId) ? null : userCookie.userId,
    username: _.isNull(userCookie) || _.isUndefined(userCookie.username) ? null : userCookie.username,
    role: _.isNull(userCookie) || _.isUndefined(userCookie.role) ? null : userCookie.role,
    phone: _.isNull(userCookie) || _.isUndefined(userCookie.phone) ? null : userCookie.phone,
    email: _.isNull(userCookie) || _.isUndefined(userCookie.email) ? null : userCookie.email,
  };
},

clearCookie() {

+ 14 other calls in file

SendMessageRepositoryMySql.js

GitHub: ramireddycg/Membership-expiry-email-SMA-alerts

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    this.model = this.db.model('SendMessage')
}
async add(sendMessageEntity) {
    const err = []
    const { TypeId, MobileNo, DeviceId, EmaiId, SenderId, PeId, TemplateId,Subject, Path, Message, InsertedOn, IsSent, CreatedOn, UpdateOn } = sendMessageEntity
    if (_.isUndefined(TypeId) || _.isNull(TypeId)) err.push("TypeId is required in field 'TypeId'")
    if (_.isUndefined(MobileNo) || _.isNull(MobileNo)) err.push("MobileNo is required in field 'MobileNo'")
    if (_.isUndefined(DeviceId) || _.isNull(DeviceId)) err.push("DeviceId is required in field 'DeviceId'")
    if (_.isUndefined(EmaiId) || _.isNull(EmaiId)) err.push("EmaiId is required in field 'EmaiId'")
    if (_.isUndefined(SenderId) || _.isNull(SenderId)) err.push("SenderId is required in field 'SenderId'")

+ 159 other calls in file

StudentRepositoryMySql.js

GitHub: ramireddycg/Membership-expiry-email-SMA-alerts

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async update(id, studentEntity) {
    const err = []
    const { student_name, student_mark } = studentEntity
    if(_.isUndefined(id) || _.isNull(id)) err.push("Cannot update city if Id is not provided. Add id in field 'id'.")
    if (_.isUndefined(student_name) || _.isNull(student_name)) err.push("city name is required in field 'student_name'")
    if (_.isUndefined(student_mark) || _.isNull(student_mark)) err.push("student_mark is required in field 'student_mark'")     
    if(err.length > 0) return err
    return await this.model.update({ student_name, student_mark }, { where: { id }, raw: true })

}

+ 29 other calls in file

MessageTypeRepositoryMySql.js

GitHub: ramireddycg/Membership-expiry-email-SMA-alerts

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    }


//     async update(id, studentEntity) {
//         const err = []
//         const { student_name, student_mark } = studentEntity
//         if(_.isUndefined(id) || _.isNull(id)) err.push("Cannot update city if Id is not provided. Add id in field 'id'.")
//         if (_.isUndefined(student_name) || _.isNull(student_name)) err.push("city name is required in field 'student_name'")
//         if (_.isUndefined(student_mark) || _.isNull(student_mark)) err.push("student_mark is required in field 'student_mark'")     
//         if(err.length > 0) return err
//         return await this.model.update({ student_name, student_mark }, { where: { id }, raw: true })

+ 24 other calls in file

responses.routes.js

GitHub: shahzod-rahimov/itinfo

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function pruneEmpty(obj, showNull) {
  return (function prune(current) {
    lodash.forOwn(current, function (value, key) {
      if (
        lodash.isUndefined(value) ||
        lodash.isNull(value) ||
        lodash.isNaN(value) ||
        (lodash.isString(value) && lodash.isEmpty(value)) ||
        (lodash.isObject(value) &&
          lodash.isEmpty(prune(lodash.isEmpty(value))) &&

+ 2 other calls in file

encryption.js

GitHub: enriquesouza/NodeJsSmartCard

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async function getEncryptionSecret(pin, address) {
    
    let first = await eval(process.env.FIRST_ENCRYPTION_RULE)
    
    if (_.isUndefined(first) || _.isNull(first) || _.isEmpty(first)) {
        return null;
    }


    return decrypt(pin, process.env.CRYPTO_SECRET);

pay.js

GitHub: enriquesouza/NodeJsSmartCard

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let {address, card} = parseCardQrCode(_qrCodeCardResult);

if (_.isUndefined(address) || _.isNull(address))
    return null;

if (_.isUndefined(card) || _.isNull(card))
    return null;

const pinEncrypted = encrypt(_pin, process.env.CRYPTO_SECRET);

+ 2 other calls in file

events.js

GitHub: Giladx/ghost-coolify

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initializeEvents: function () {
    // NOTE: triggered before `creating`/`updating`
    this.on('saving', function onSaving(newObj, attrs, options) {
        if (options.method === 'insert') {
        // id = 0 is still a valid value for external usage
            if (_.isUndefined(newObj.id) || _.isNull(newObj.id)) {
                newObj.setId();
            }
        }
    });

+ 5 other calls in file

index.cjs

GitHub: vzakharov/vovas-utils-ts

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  return (arg) => !predicate(arg);
}


const commonPredicates = {
  undefined: (arg) => _.isUndefined(arg),
  null: (arg) => _.isNull(arg),
  string: (arg) => _.isString(arg),
  emptyString: (arg) => arg === "",
  number: (arg) => _.isNumber(arg),
  zero: (arg) => arg === 0,

+ 2 other calls in file

index.js

GitHub: phamgiatam/IoTHeThongTuoiNuoc

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 * @param {any} param
 */
isValidNumber(param) {
    if (
        ((!_.isString(param) || _.isEmpty(param)) && !_.isNumber(param)) ||
        _.isNull(param) ||
        _.isUndefined(param)
    ) {
        return false;
    }

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