I have a menu drop down and a series of filter drop downs, both of which have been working fine up until today.
After adding a logo, with css, to the menu drop down, when I select a filter it breaks my javascript for the menu and the menu doesn't work at all. I get an Uncaught Typeerror.
The filters use forms and 'get' to sort with the onChange set to re-submit the page with the appropriate 'get' parameters.
Here is the menu html
<button id="burg" onclick="menuChange();" class="hamburger">☰</button>
<button id="xCross" onclick="menuChange();" class="cross">˟ </button>
<ul id="navList">
<div class="nav-item">
<a href="inventory.php">
<li>Inventory</li>
</a>
</div>
<div class="nav-item">
<a href="#">
<li>Finance</li>
</a>
</div>
<div class="nav-item">
<a href="contact.php">
<li>Contact Us</li>
</a>
</div>
<div class="nav-item">
<a href="about.html">
<li>About Us</li>
</a>
</div>
<div id="lastNav" class="nav-item">
<a href="reviews.html">
<li>Reviews</li>
</a>
</div>
<div class="" id="navImage">
<a href="index.html">
<li><img src="images/asmOriginalLogo_V4.png" alt="Arizona Specialty Motors"/>
<div id="dropDownSocial"> <a href="#"><img class="socialMediaLinks" src="images/fbLogo.png" alt="Facebook"/></a> <a href="#"><img class="socialMediaLinks" src="images/In-Black-128px-TM.png" alt="LinkedIn"/></a> <a href="#"><img class="socialMediaLinks" src="images/instaGlyph.png" alt="Instagram"/></a> <a href="#"><img class="socialMediaLinks" src="images/twitterLogo.png" alt="Twitter" /></a> </div>
</li>
</a>
</div>
</ul>
<div id="dropdownFreeze">
Here is my javascript function to open/close the menu.
function menuChange() {
"use strict";
/****** Variables *****/
// Burger link & image
var burger = document.getElementById("burg");
// Individual drop down elements; home, inventory, etc.
var lines = document.getElementsByClassName("nav-item");
// Overall container; to make dropdown 'un-scrollable'
var mainArea = document.getElementById("dropdownFreeze");
// Cross link & image
var cross = document.getElementById("xCross");
// Background for dropdown & navigation
var navList = document.getElementById("navList");
// Social Media images & buttons
var social = document.getElementById("navImage");
// If menu is open, close it. If closed, open it
if (burger.style.display === 'none') {
burger.style.display = 'block';
cross.style.display = 'none';
navList.style.display = 'none';
social.style.display = 'none';
for (var i = 0; i < lines.length; i++) {
lines[i].style.display = 'none';
}
mainArea.style.position = 'relative';
} else {
burger.style.display = 'none';
cross.style.display = 'block';
navList.style.display = 'block';
social.style.display = 'block';
for (var j = 0; j < lines.length; j++) {
lines[j].style.display = 'block';
}
mainArea.style.position = 'fixed';
}
}
Here is one of my filters (all of them cause issues now, but didn't before adding the 'navImage' div)
<form name="sortMake" action="inventorySort.php?limit=10&page=1" method="get">
<select name="makeOrder" class="dropButton" onchange=this.form.submit();>
<option value="choose">Make</option>
<?php
$makeQuery = "select distinct make from vehicle order by make asc";
$makeResult = mysqli_query( $con, $makeQuery );
$selectMakeCount = 0;
if ( $makeResult ) {
while ( $makeRow = mysqli_fetch_array( $makeResult ) ) {
if ( isset( $_GET[ 'makeOrder' ] ) && $_GET[ 'makeOrder' ] == $makeRow[ 'make' ] ) {
echo '<option value="' . $makeRow[ 'make' ] . '"selected>' . $makeRow[ 'make' ] . '</option>';
} else {
echo '<option value="' . $makeRow[ 'make' ] . '">' . $makeRow[ 'make' ] . '</option>';
}
}
}
?>
</select>
The Uncaught Typeerror points to
mainArea.style.position = 'relative';
And to
navList.style.display = 'block';
It says that it cannot read property 'style' of null.
I'm fairly certain the issue is happening in the filter/get.
Wow I feel like a scrub.
For whatever reason, my ids for navList and dropDownFreeze got deleted from one of my pages. After resetting them, it worked perfectly.
Code: 1 Me: 0
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.