Double Sticky Header Implementation with Vue: Pitfalls and Solutions

Introduction

During the development of an activity page, a requirement for a two‑layer sticky header arose, needing compatibility with IE9 and above. The final effect is shown in the accompanying image, where the first layer (Tabs) sticks and can be clicked to return to its sticky position, while the second layer switches on hover without rebound.

Implementation Method

The solution primarily uses the VueSticky plugin. Steps include installing the package, importing it, and applying the directive:

Install: npm install vue-sticky --save

Import: import VueSticky from "vue-sticky"

Use:

directives: { 'sticky': VueSticky, },

<ELEMENT v-sticky="{ zIndex: NUMBER, stickyTop: NUMBER, disabled: [true|false] }">
  <div>
CONTENT
  </div>
</ELEMENT>

The plugin checks for position:sticky support; if unavailable, it falls back to position:fixed , ensuring IE9+ compatibility.

Effective Conditions

For v-sticky to work, the following must be satisfied:

The parent element must not have overflow:hidden or overflow:auto .

At least one of top, bottom, left, or right must be specified.

The parent’s height must not be less than the sticky element’s height.

The sticky element only works within its parent.

Problem Summary

Sticky Overlap

In Chrome/Firefox, the two sticky layers overlap when disappearing. The cause is that the first layer still meets sticky conditions while the second begins to disappear.

Solution: Add a minHeight to the first layer equal to the sum of both layers’ heights, updating it on scroll when the distance to the bottom matches this sum.

const offsetTop = document.querySelector(".xxx").offsetBottom;
if (offsetBottom <= sumHeight) {
    document.querySelector(".xxx").style.minHeight = sumHeight;
} else {
    document.querySelector(".xxx").style.minHeight = initialHeight;
}

Sticky "Reluctant to Leave"

In IE, the sticky element does not disappear at the component bottom.

Solution: Listen to scroll events and set v-sticky="{ stickyTop: 0, disabled: false }" ’s disabled to true when reaching the bottom.

Sticky "Hard to Separate"

In IE, both sticky layers remain stuck together.

Solution: Change the second layer’s position to static in non‑sticky regions via scroll listeners.

Sticky "Deformation"

In IE, the sticky element deforms due to position:fixed being applied to its first child.

Solution: Wrap the sticky content with an extra div to maintain layout consistency.

<div v-sticky="{ stickyTop: 0, disabled: false }">
    <div>
content
    </div>
</div>

Notes

Component lifecycle: add scroll listeners in mounted() and remove them in beforeDestroy() (or destroy ).

mounted() {
    // handleScroll is the scroll callback
    window.addEventListener('scroll', this.handleScroll);
},

beforeDestroy() {
    removeEventListener('scroll', this.handleScroll);
},

Optimization Points

Detect CSS sticky support: if unsupported, use scroll listeners to emulate sticky behavior.

Lazy‑load images to improve page load performance.

let supportCSSSticky = document.querySelector(".xxx").style.position === "sticky";
if (!supportCSSSticky) {
    // fallback to scroll listener implementation
}

Conclusion

The article introduced the VueSticky plugin’s principle, shared common pitfalls encountered during a double sticky header implementation, and offered concrete solutions, aiming to help developers achieve reliable sticky effects across modern browsers and IE9+.