How to get <apex:inputtext> value in javavscript?

Question

"textvalue" is a string {get;set in my controller. Onclick of button i want to get the value of "textvalue" in my script to do some validation.

vf:
<apex:inputText value="{!textvalue}" styleClass="slds-select" style="width : 57%;"/> 
<input id="recordHidden" type="hidden" name="theHiddenInput" value="{!textvalue}"/>
<Button  onclick="check();return false;">Enter This Reject Reason</Button>



function check(){
 alert(document.getElementById('recordHidden').value);

}

Answer 1

<apex:inputText value="{!textvalue}" styleClass="slds-select" style="width : 57%;" id="textId"/> 
var CaseSub= $('[id$=textId]').val();
alert(CaseSub);

By setting an id to input text you can get the value in script like above