This is an example of my code. I want to use my existing if/else statement inside a try-catch block, and push when validation fails. I'm trying to use try-catch in between if/else condition and it gives me an error.
var errLogs = [];
try {
var a = "ABCD";
if(typeof a === "string"){
console.log("equel");
}catch(e) {
}else{
console.error("not equel");
}
console.log(e);
errLogs.push(e);
}
You can throw a new error to go directly to catch like:
var errLogs = [];
try {
var a = "ABCD"; // or, test it with number 123
if (typeof a === "string") {
console.log("equel");
} else {
throw new TypeError("not equel")
}
} catch (e) {
console.log(e);
errLogs.push(e);
}
DEMO:
var errLogs = [];
function testString(value) {
try {
if (typeof value === "string") {
console.log("equel");
} else {
throw new TypeError("not equel")
}
} catch (e) {
console.log(e.message);
errLogs.push(e.message);
}
}
testString('ABCD');
console.log('Now testing with number --->')
testString(123);Update your code like this
var errLogs = [];
try {
var a = "ABCD";
if(typeof a === "string"){
console.log("equel");
}
else{
console.error("not equel");
//you dont need else there- once exception is thrown, it goes into catch automatically
}
}catch(e) {
console.log(e);
errLogs.push(e);
}
Try somthing like this.
function IsString(d){
try {
if(typeof d==='string'){
return {isString:true,error:""};
}
return {isString:false,error:`data type is ${typeof(d)}`};
} catch (err) {
return {isString:false,error:`error:${e}`};
}
}
//TEST CASE
let errorLogs=[]
//#1
let check1=IsString(null);
errorLogs.push(check1)
//#3
let check2=IsString(123);
errorLogs.push(check2)
//#4
let check3=IsString('');
errorLogs.push(check3)
//#5
let check4=IsString('');
errorLogs.push(check4)
//Output
console.log(errorLogs)