javascript null or empty
var myVar=null;
if(myVar === null){
//I am null;
}
if (typeof myVar === 'undefined'){
//myVar is undefined
}
//check if string is undefined
if (typeof myVar === 'undefined'){
console.log("I am not defined");
}
//check if string is empty, null, or 0
var emptyString="";
if (emptyString) {
console.log("im not empty");
}
Also in JavaScript:
- package json add git repo
- search in a table jquery
- vuepress firebase authentication
- lexical scope javascript
- python dict to json
- format date javascript
- convert class object to json python
- javascript cartesian product
- react js filter array of on search
- ajax add header
- mongodb replace string
- how to add shadow to text in canvas nodejs
- check multiple ifield if it's blank in jquery
- mysqli_real_escape_string use with ajax
- javascript getposts callback
- javascript access php variable
- check textbox value on ng-change value == in angular
- make ajax request post jquery
- jquery works until modal is shown
- insanceof
- callback in js
- access selected option in jquery
- javascript check if object is empty
- get value of textarea jquery