File your-component-name.component.html
<input type="text" #inputbox>
<button type="submit" (click)="getelementData()">Show element data</button>
file your-component-name.component.ts
In the class make function named as
getelementData(nameinput){
console.log(nameinput); // output will be the whole button element with their attributes
// if you want to show specific attribute data then
console.log(nameinput.value); // it will reflects the value of textbox which has been entered
}