What steps can I take to prevent flex box content from exceeding the original height of the page?

I am trying to ensure that the textarea does not exceed the original length of the page, eliminating the need for a scrollbar to view the entire content.

Currently, I am implementing the solution provided in response to this query using flexbox to make it adjust its height dynamically.

At present, the text area extends beyond the original size, resulting in a scrollbar appearing and requiring scrolling to view all content.

html, body {
    height: 100%;
    margin: 0;
}

input[type=text]{
    width: 100%;
    font-size: 32px;
    border: 3px solid #999;
    padding: 12px 20px;
    margin: 5px 10px;
    box-sizing: border-box;
    flex: 0 1 auto;
    outline: none;
}

div {
    display: flex;
}

.fillspace {
    display: flex;
    height: 100%;
}

input[type=text]:focus{
    border: 3px solid #555;
}

button {
    background-color: #0099cc;
    border: none;
    color: white;
    text-align: center;
    padding: 16px 32px;
    text-decoration: none;
    display: inline-block;
    font-size: 32px;
    margin: 5px 10px 5px 0;
}

button:hover{
    background-color: #007399;
    outline: none;
}

button:active{
    background-color: #007399;
}

textarea{
    outline: none;
    resize: none;
    font-size: 32px;
    border: 3px solid #999;
    padding: 12px 20px;
    margin: 5px 10px 10px 10px;
    box-sizing: border-box;
    width: 100%;
    height: 100%;
    flex: 1 1 auto;
}

textarea:focus{
    border: 3px solid #555;
}

h1{
    text-align: center;
    font-family: Impact, Haettenschweiler, 'Arial Narrow Bold', sans-serif;
}
<body>
    
    <h1>Command Queue</h1>

    <div>
        <input placeholder="Type command here" type="text"/>
        <button>Run</button>
    </div>

    <div class="fillspace">
        <textarea id="commandOutput">{{.}}</textarea>
    </div>

</body>

htmlcssflexbox

Answer №1

To tackle this issue using flex, simply adjust the following CSS rules:

html, body {
    height: 100%;
    margin: 0;
    display: flex;
    flex-direction: column;
}
div {
    display: flex;
}

.fillspace {
    flex: 1
}

Remember to have a container with a display set as flex, such as in this case with a column direction (body), and then apply flex: 1 to the container you wish to expand as much as possible.

Hopefully, this explanation proves useful,

Best regards

Answer №2

My solution involved utilizing the offsetHeight property

const textarea = document.querySelector("textarea");
const a = document.querySelector("#a");
const input = document.querySelector("input");
const h1 = document.querySelector("h1");

let a_h = a.offsetHeight;
let inp_h = input.offsetHeight;
let h1_h = h1.offsetHeight;

let total_height = a_h + inp_h + h1_h;

textarea.style.height = "calc(100% - " + total_height + "px)";
html, body {
    height: 100%;
    margin: 0;
    overflow:hidden;
}

input[type=text]{
    width: 100%;
    font-size: 32px;
    border: 3px solid #999;
    padding: 12px 20px;
    margin: 5px 10px;
    box-sizing: border-box;
    flex: 0 1 auto;
    outline: none;
}

div {
    display: flex;
}

.fillspace {
    display: flex;
    height: 100%;
}

input[type=text]:focus{
    border: 3px solid #555;
}

button {
    background-color: #0099cc;
    border: none;
    color: white;
    text-align: center;
    padding: 16px 32px;
    text-decoration: none;
    display: inline-block;
    font-size: 32px;
    margin: 5px 10px 5px 0;
}

button:hover{
    background-color: #007399;
    outline: none;
}

button:active{
    background-color: #007399;
}

textarea{
    outline: none;
    resize: none;
    font-size: 32px;
    border: 3px solid #999;
    padding: 12px 20px;
    margin: 5px 10px 10px 10px;
    box-sizing: border-box;
    width: 100%;
    height: 100%;
    flex: 1 1 auto;
}

textarea:focus{
    border: 3px solid #555;
}

h1{
    text-align: center;
    font-family: Impact, Haettenschweiler, 'Arial Narrow Bold', sans-serif;
}
<body>
    
    <h1>Command Queue</h1>

    <div id="a">
        <input placeholder="Type command here" type="text"/>
        <button>Run</button>
    </div>

    <div class="fillspace">
        <textarea id="commandOutput">{{.}}</textarea>
    </div>

</body>

Answer №3

Give this a shot:

html, body {
    height: 100%;
    margin: 0;
}

body {
    display: flex;
    flex-direction: column;
}

body > * {
    flex: 0 0 auto;
}

input[type=text]{
    width: 100%;
    font-size: 32px;
    border: 3px solid #999;
    padding: 12px 20px;
    margin: 5px 10px;
    box-sizing: border-box;
    outline: none;
}

div {
    display: flex;
}

.fillspace {
    flex: 1 0 auto;
}

input[type=text]:focus{
    border: 3px solid #555;
}

button {
    background-color: #0099cc;
    border: none;
    color: white;
    text-align: center;
    padding: 16px 32px;
    text-decoration: none;
    display: inline-block;
    font-size: 32px;
    margin: 5px 10px 5px 0;
}

button:hover{
    background-color: #007399;
    outline: none;
}

button:active{
    background-color: #007399;
}

textarea{
    outline: none;
    resize: none;
    font-size: 32px;
    border: 3px solid #999;
    padding: 12px 20px;
    margin: 5px 10px 10px 10px;
    box-sizing: border-box;
    width: 100%;
}

textarea:focus{
    border: 3px solid #555;
}

h1{
    text-align: center;
    font-family: Impact, Haettenschweiler, 'Arial Narrow Bold', sans-serif;
}
<body>

    <h1>Command Queue</h1>

    <div class="cmd-group">
        <input placeholder="Enter command here" type="text"/>
        <button>Execute</button>
    </div>

    <div class="fillspace">
        <textarea id="commandOutput">{{.}}</textarea>
    </div>

</body>

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