JSFiddle - React, Tailwind, and code Playground

by Mark Coleman

HTML

<div class="field">
    <label for="propertyprice">Price</label>
    <input id="currency2" name="limitedtextfield" size="50" 
    type="text" class="medium"  />
    <p class="field_help">Enter only numbers.</p></div>

<div class="field">
    <label for="propertypricerange">Price Range </label>
    <select id="propertypricerange" name="propertypricerange" class="medium">
        <optgroup label="Enter Price Range">
            <option selected="selected" value="0">0    -    $100,000</option>
            <option value="100000">$100,000    -    $200,000</option>       
            <option value="200000">$200,000    -    $300,000</option>
            <option value="300000">$300,000    -    $400,000</option>
            <option value="400000">$400,000    -    $500,000</option>       
            <option value="500000">$500,000    -    $600,000</option>       
            <option value="600000">$600,000    -    $700,000</option>       
            <option value="700000">$700,000    -    $800,000</option>       
            <option value="800000">$800,000    -    $900,000</option>       
            <option value="900000">$900,000    -    $1,000,000</option>     
            <option value="1000000">$1,000,000    -    $2,000,000</option>      
            <option value="2000000">$2,000,000    -    $3,000,000</option>      
            <option value="3000000">$3,000,000    -    $4,000,000</option>      
            <option value="4000000">$4,000,000    -    $5,000,000</option>      
            <option value="5000000">$5,000,000    -    $10,000,000</option>
        </optgroup>
    </select>
</div>

JavaScript

$("#currency2").keyup(function() {
    var price = $(this).val().replace(/\$|\,/g, '');
    if (isNaN(price)) {
        $("select").val("0");
        return;
    }
    var n = [1, 10, 100, 1000, 10000, 10000, 100000, 1000000, 1000000];
    var d = n[price.length - 1];
    var number = Math.round(price / d) * d;
    var f = function() {
        var $last = $("select option").last();
        if (number > $last.attr("value")) {
            $last.attr("selected", true);
        }
        else {
            $("select option[value=" + price + "]").attr("selected", true);
        }
    };
    clearTimeout(f);
    setTimeout(f, 200);
});