i want to update name of person after every second in ui after feching name from lifeSpanObj object in .vue file (vuejs).
<div> {{personName}}</div> // in template using this this(its example not exactly this)
this.lifeSpanObj.forEach((element, i) => {
setTimeout(function () {
this.personName = element.name;
console.log(this.personName);
}, 1000);
});
using the above example i am able to print updated values in console but UI does not get updated. what could fix for this?
Make sure always use arrow function to not shadow this keyword:
this.lifeSpanObj.forEach((element, i) => {
setTimeout(() => { // arrow function instead of anonymous function
this.personName = element.name; // now this refers to the vue component
console.log(this.personName);
}, 1000);
});
for primitive function (in ES5) you can still follow the below approach
this.lifeSpanObj.forEach((element, i) => {
var self = this;
setTimeout(function () {
self.personName = element.name;
console.log(self.personName);
}, 1000);
});