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<span class="title">Samples</span>
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</a>
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<a href="https://flutter.dev/">Flutter Home</a>
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<div class="container">
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<div class="description-title-row">
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<h1>Handle changes to a text field</h1>
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<div class="type-label type-label-bordered">cookbook</div>
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</div>
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<p>By Flutter</p>
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<button class="mdc-button mdc-button--outlined" onclick="window.location.href = 'https://flutter.dev/docs/cookbook/forms/text-field-changes.html';"> <span class="mdc-button__ripple"></span>View Recipe</button>
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<span>Tags</span>
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<a href="./#?search=tag%3Acookbook">cookbook</a>
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<a href="./#?search=tag%3Aforms">forms</a>
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<div class="screenshots">
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<img src="images/cookbook/text-field-changes.png" alt="Cookbook article" />
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<div class="description">
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<p>In some cases, it’s useful to run a callback function every time the text
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in a text field changes. For example, you might want to build a search
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screen with autocomplete functionality where you want to update the
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results as the user types.</p>
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<span>© Flutter 2020</span>
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