function waitForElement(){
if(typeof someVariable !== "undefined"){
//variable exists, do what you want
}
else{
setTimeout(waitForElement, 250);
}
}
Here is what the above code is Doing:
1. It checks if the variable exists.
2. If it does, it does what you want.
3. If it doesn’t, it waits 250 milliseconds and then tries again.
# Try this if you want to enable it only for production: import redirectSSL from ‘redirect-ssl’; export default { serverMiddleware: [redirectSSL.create({enabled: process.env.NODE_ENV === ‘production’})] } Here is what the above code is Doing: 1. We’re importing the redirectSSL middleware from the redirect-ssl package. 2. We’re creating a new instance of the redirectSSL middleware and passing…
var j = 10; for (var i = 0; i < j; i++) { (function(cntr) { // here the value of i was passed into as the argument cntr // and will be captured in this function closure so each // iteration of the loop can have it's own value asynchronousProcess(function() { console.log(cntr); }); })(i);...
//to display error message just put this code at the end of your brackets .catch((err) =>{ console.log(err); Here is what the above code is Doing: 1. We’re using the .catch() method to catch any errors that may occur. 2. We’re passing in a callback function that takes in an error parameter. 3. We’re using the…
jQuery.isEmptyObject({}); // true jQuery.isEmptyObject({ foo: “bar” }); // false // Remember to replace ‘jQuery’ with the correct alias if you’re importing jquery: import $ from ‘jquery’; $.isEmptyObject({ foo: “bar” }); // false Here is what the above code is Doing: 1. We’re importing the jQuery library into our JavaScript file. 2. We’re using the jQuery…
var fruitObject = { ‘a’ : ‘apple’, ‘b’ : ‘banana’, ‘c’ : ‘carrot’ }; Object.keys(fruitObject); // this returns all properties in an array [“a”, “b”, “c”] fruitObject[Object.keys(fruitObject)[Object.keys(fruitObject).length – 1]] // “carrot” Here is what the above code is Doing: 1. Object.keys(fruitObject) returns an array of all the properties in fruitObject. 2. Object.keys(fruitObject)[Object.keys(fruitObject).length – 1] returns…
var OpenStreetMap_Mapnik = L.tileLayer(‘https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png’, { maxZoom: 19, attribution: ‘© OpenStreetMap contributors’ }); var OpenAIP = L.tileLayer(‘http://{s}.tile.maps.openaip.net/geowebcache/service/tms/1.0.0/openaip_basemap@EPSG%3A900913@png/{z}/{x}/{y}.{ext}’, { attribution: ‘openAIP Data (CC-BY-NC-SA)’, ext: ‘png’, minZoom: 4, maxZoom: 14, tms: true, detectRetina: true, subdomains: ’12’ }); Here is what the above code is Doing: 1. We’re creating a variable called map. This variable will hold our map….