Two ways to assign values ​​and pass parameters to onclick using js_javascript skills

1) When the method has no parameters, the value can be assigned directly using onclick = method name

Copy code The code is as follows:

window.onload = function() {
$('btnTest').onclick = test;
}
function test() {
alert(val);
}

2) When the method has parameters, it is wrong to use onclick = method name (parameter). You need to add function() in front of the method name

Copy code The code is as follows:

window.onload = function() {
$('btnTest').onclick = function( ) { test(1) };
}
function test(val) {
alert(val);
}