/TypeScript/Uncaught TypeError: Cannot read property 'value' of undefined at Object.onChange

Uncaught TypeError: Cannot read property 'value' of undefined at Object.onChange

var x=document.form1.n1.value;
var y=document.form1.n2.value;
var z=document.form1.n3.value;
function verif(x,y,z){
    if (isNaN(x)|| isNaN(y) || isNaN(z))){
        alert("Verifier les champs de saisie");
        return false;
    }
    else { return true}
}
function compar(){
if(verif(x,y,z)){ 
    if (x==z==y){
    alert("les trois variables sont identiques");
}if ((x==z) || (z==y) || (x==y)){
    alert("Deux variables sont de valeurs égales");}
else{
        alert("les trois variables sont différentes");}}}

Similar codes

7 votes194 views4 answers
View tar.gz contents without extracting
TypeScript
0 vote186 views1 answer
Use multy line in typescript
TypeScript
0 vote289 views1 answer
Already included file name react tsconfig
TypeScript
0 vote213 views1 answer
Write getter angular
TypeScript
5 votes196 views3 answers
Mat-form-field must contain a MatFormFieldControl
TypeScript
0 vote203 views1 answer
I like
TypeScript
0 vote248 views1 answer
This method can provide higher level of accuarcy in cost estimation based on the given historical data
TypeScript
5 votes193 views2 answers
Javascript convert classes to arrays
TypeScript
6 votes201 views4 answers
Data
TypeScript
0 vote197 views1 answer
Ts vue important
TypeScript