DOM Controls that do things

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1) A button




When  the user clicks the button the DOM gets changed.



Input

 
Output
let b = document.createElement('button');
b.innerText = 'click me';
b.onclick = ()=>{
  document.body.append('Hello world');
}
document.body.append(b);



let b = document.createElement('button');
b.innerText = 'click me';
b.onclick = ()=>{
  document.body.append('Hello World!');
}
document.body.append(b);





2) An input box and a button




The user can change the text that gets echoed.



Input

 
Output
let i = document.createElement('input');
i.value = 'New York ';
let b = document.createElement('button');
b.innerText = 'click me';
b.onclick = ()=>{
  document.body.append(i.value);
}
document.body.append(i,b);



let i = document.createElement('input');
i.value = 'New York ';
let b = document.createElement('button');
b.innerText = 'click me';
b.onclick = ()=>{
  document.body.append(i.value);
  document.body.append(i.value);
}
document.body.append(i,b);





3) Change Color




Input

 
Output
let i = document.createElement('input');
i.value = 'green';
let b = document.createElement('button');
b.innerText = 'click me';
b.onclick = ()=>{
}
document.body.append(i,b);



let i = document.createElement('input');
i.value = 'green';
let b = document.createElement('button');
b.innerText = 'click me';
b.onclick = ()=>{
}
document.body.append(i,b);











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