Check if string is empty inside a placeholder tag?

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Is there a way to check if a string is empty inside a tag? I have this input field and it has a placeholder tag. I need to check if the variable which goes inside placeholder tag is empty.

<input type="text" placeholder={{searchText}}> 

How can I check if searchText is empty and render something else while it is empty?

Try

<input type="text" placeholder="{{ searchText || 'searchText Is Empty'}}">

Check if string is empty inside a placeholder tag? - angular - html, If you don't prevent the default behavior, browsers will navigate the user to the URL stated in the action attribute. const form = document. Two input fields with a placeholder text: Definition and Usage. The placeholder attribute specifies a short hint that describes the expected value of an input field (e.g. a sample value or a short description of the expected format). The short hint is displayed in the input field before the user enters a value.

You can write any expression into your placeholder, then you could do something as :

<input type="text" placeholder={{searchText && searchText.length ? searchText : 'other text' }}> 

Checking if an input is empty with JavaScript, Is it possible to know if an input is empty with only CSS? I had that <form> <​label for="input"> Input </label> <input type="text" id="input" /> </form> In the article, Chris talks about a :placeholder-shown pseudo-class. When anything is typed, the placeholder disappears. If the form field is cleared, the placeholder reappears. See the Pen Placeholders Are Not Labels by Josh Winn (@forthewinn) on CodePen.0. Forms with Pre-Filled Values Are Often Ambiguous. An online form does not always start in an empty state.

You can achieve it by using ternary operator.

   condition ? expr1 : expr2


 <input type="text" placeholder="{{searchText.trim() !='' ? searchText : 'some other text' }}">

Checking if an input is empty with CSS, How to pass an array as a function parameter in JavaScript ? Difference between node.js require and ES6 import and export · JavaScript | Function binding · How to If we want to check any string either it is filled or empty we can use Javascript for such purpose for example : form validation. placeholder = "​Enter name". A conditional placeholder must appear inside a string preceded by an [*IF*] tag, that is, inside the original string. If you set the value of $explicitElse to 'false', then the appearance of an [*ELSE*] with an alternate string is optional. If there is no [*ELSE*], the alternate string is taken to be an empty string.

How to check empty/undefined/null string in JavaScript , W3Schools is optimized for learning, testing, and training. Examples might be simplified to improve reading and basic understanding. Tutorials, references, and​  The string value of an empty node set (which is what the XPath expression categoryName gives you when there are no categoryName child elements in the current context) is defined to be the empty string, so this is redundant - string-length(categoryName) is zero if there are no categoryName elements.

How To Add Validation For Empty Input Field with JavaScript, The placeholder property sets or returns the value of the placeholder attribute of a text The short hint is displayed in the text field before the user enters a value. Return Value: A String, representing a short hint that describes the expected value of the text field W3Schools is optimized for learning, testing, and training. You must remember to include name attribute on the <input> element, otherwise the text field's value won't be included with the submitted data. Setting placeholders. You can provide a useful placeholder inside your text input that can provide a hint as to what to enter by including using the placeholder attribute. Look at the following example:

HTML DOM Input Text placeholder Property, If you access variables inside tags don't put the braces around them. For example, if, with the default syntax, you want to use {{ as a raw string in a engine that a child template may override those placeholders in the template. In the simplest form, you can use it to test if a variable is defined, not empty and not false:. When the select element is required it allows use of the :invalid CSS pseudo-class which allows you to style the select element when in its "placeholder" state. :invalid works here because of the empty value in the placeholder option. Once a value has been set, the :invalid pseudo-class will be dropped. You can optionally also use :valid if you so wish.

Comments
  • Sorry.. my fault Try: <input type="text" placeholder="{{ searchText || 'searchText Is Empty'}}">