Expanding div contents not adapting to full width due to lack of flex grow property

Question

Expanding div contents not adapting to full width due to lack of flex grow property

My goal is to make the input elements fill the entire width they are allotted, but for some reason, they remain at their default size when initially rendered.

Check out the CodeSandbox

I found a workaround by adding the following:

. . .
<input style={{ width: '100%' }}
. . .

However, I thought using flex grow would achieve this automatically.

I also tried using flexBasis: '100%' instead of flexGrow: 1, but it didn't make a difference.

I'm not sure what I'm doing wrong here. Do I really have to manually set the width of the input element to get it to change?

Expected output: https://i.sstatic.net/4rz0m.png

javascript css reactjs flexbox

Answer 1

Answer №1

To ensure that input elements occupy maximum space within the flex container, there are a couple of methods you can employ:

Set a specific width for the input elements. When you define flex-basis or flex-grow, you are actually specifying those properties on the container of the input element, not directly on the input itself. This causes the container to expand in size, rather than the input.

const Input = ({ label }) => (
  <div className="inputContainer">
    <div>{label}</div>
    <input />
  </div>
);

function App() {
  return (
    <div className="container">
      <Input label="First Input" />
      <Input label="Second Input" />
    </div>
  );
}

ReactDOM.render(<App />, document.getElementById("root"));

.container { display: flex; }
.inputContainer { flex-grow: 1; }

.inputContainer input {
  width: 100%;
  box-sizing: border-box;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/react/16.13.1/umd/react.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.13.1/umd/react-dom.production.min.js"></script>
<div id="root"></div>

Another approach to achieve the desired layout is by making the input container a flex container and then applying flex-grow or flex-basis to the div wrapping both the label and the input element.

const Input = ({ label }) => (
  <div className="inputContainer">
    <div>
      <label>{label}</label>
      <input />
    </div>
  </div>
);

function App() {
  return (
    <div className="container">
      <Input label="First Input" />
      <Input label="Second Input" />
    </div>
  );
}

ReactDOM.render(<App />, document.getElementById("root"));

.container,
.inputContainer, 
.inputContainer div {
  display: flex;
}

.inputContainer {
  flex-grow: 1;
}

.inputContainer div {
  flex-direction: column;
  flex-grow: 1;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/react/16.13.1/umd/react.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.13.1/umd/react-dom.production.min.js"></script>
<div id="root"></div>

Answer 2

To ensure that input elements occupy maximum space within the flex container, there are a couple of methods you can employ:

Set a specific width for the input elements. When you define flex-basis or flex-grow, you are actually specifying those properties on the container of the input element, not directly on the input itself. This causes the container to expand in size, rather than the input.

const Input = ({ label }) => (
  <div className="inputContainer">
    <div>{label}</div>
    <input />
  </div>
);

function App() {
  return (
    <div className="container">
      <Input label="First Input" />
      <Input label="Second Input" />
    </div>
  );
}

ReactDOM.render(<App />, document.getElementById("root"));

.container { display: flex; }
.inputContainer { flex-grow: 1; }

.inputContainer input {
  width: 100%;
  box-sizing: border-box;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/react/16.13.1/umd/react.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.13.1/umd/react-dom.production.min.js"></script>
<div id="root"></div>

Another approach to achieve the desired layout is by making the input container a flex container and then applying flex-grow or flex-basis to the div wrapping both the label and the input element.

const Input = ({ label }) => (
  <div className="inputContainer">
    <div>
      <label>{label}</label>
      <input />
    </div>
  </div>
);

function App() {
  return (
    <div className="container">
      <Input label="First Input" />
      <Input label="Second Input" />
    </div>
  );
}

ReactDOM.render(<App />, document.getElementById("root"));

.container,
.inputContainer, 
.inputContainer div {
  display: flex;
}

.inputContainer {
  flex-grow: 1;
}

.inputContainer div {
  flex-direction: column;
  flex-grow: 1;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/react/16.13.1/umd/react.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.13.1/umd/react-dom.production.min.js"></script>
<div id="root"></div>

Expanding div contents not adapting to full width due to lack of flex grow property

Answer №1

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