LWC lightnig input type date max value dynamically

Question

LWC lightnig input type date max value dynamically I'm trying to add max Date as 2 years from now. Getting the error ass add_years is not defined

Any suggestion would be great..

Html:

<lightning-input class="dateBoxWidth" type="date" date-style="short" value={select.recordValue} onchange={handleChnage} min={todayDate} max={renewExpiryDate}></lightning-input>


<lightning-input class="dateBoxWidth" type="date" date-style="short" value={select.recordValue} onchange={handleChnage} min={todayDate} max={renewExpiryDate}></lightning-input>

js:

var newDate = new Date(); 
        this.todayDate = newDate.toLocaleDateString();
var ExpiryDate = new Date();
        this.renewExpiryDate = add_years(ExpiryDate, 2).toLocaleDateString();