placeholders

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Definitions from WordNet

Noun placeholder has 2 senses

proxy, placeholder, procurator - a person authorized to act for another
--₁ is a kind of agent
placeholder - a symbol in a logical or mathematical expression that can be replaced by the name of any member of specified set
--₂ is a kind of variable

Definitions from the Web

Term: Placeholders

Description:

Placeholders are used in programming and web development to temporarily store and display generic or variable content in a designated area. They serve as a temporary representation until the actual content is ready or retrieved.

Sense 1 - Noun:

A placeholder, in the context of web development, refers to a pre-defined spot or container where content will be displayed or filled in dynamically. It is commonly used to hold text, images, or other multimedia elements until the actual data is loaded.

Usage:

In HTML, a placeholder can be defined using the placeholder attribute in input fields:

  <input type="text" placeholder="Enter your name">

Sample Sentence:

The search bar on the website had a placeholder text saying "Search here..." until the user input their query.

Sense 2 - Noun:

In software development, a placeholder refers to a symbol or token that represents a value or variable in the code. It helps programmers define and structure code in a way that can be easily replaced or modified.

Usage:

Programmers often use placeholders in SQL queries to inject dynamic values:

  SELECT * FROM users WHERE age > ?;

Sample Sentence:

The developer used placeholders in the code to make it easier to update database queries without rewriting the entire SQL statement.

Sense 3 - Noun:

Placeholders, in the marketing context, refer to dummy or temporary products used for display purposes. They are often placed on shelves or in showcases to give an idea of how the actual product will look or create a sense of availability.

Usage:

In retail stores, placeholders can be substituted for real products for visual presentation.

Sample Sentence:

The new smartphone model was not available yet, so the store used placeholders to showcase its features and design.

Sense 4 - Noun (Local):

Locally, placeholders can refer to seats or spots reserved for specific individuals or groups in an event or venue. These designated spaces remain unoccupied until the expected individuals arrive.

Usage:

In a conference, there were placeholders for VIP guests in the front row.

Sample Sentence:

The theater had placeholders with reserved signs on certain seats for the members of the production team.