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I form Get common forms (first two) 1)document. name attribute value of the form Get the form object through the name attribute value of the form. 2)document.getElementId("id attribute value"); Get the form object through the id attribute value of the from tag. 3)document.forms [name attribute value of the form] Get the form o ...

1, Get form             1. Document getelementbyid ("ID attribute value"); Get the form object through the id attribute value of the from tag             2. document. name attribute value of the form; Get the form object through ...

backgroundThe team has a node recently JS new module needs to be developed, involving the management and communication of multiple processes. The simplified model can be understood as some methods that need to frequently call the worker process from the master process. A simple design and implementation is implemented event-invoke The library c ...

Solution of adding explicit watermark to web pages at the front endIn order to prevent information leakage and protect copyright, we often use watermark in the front end.Of course, watermark can also be divided into bright watermark and dark watermark. Today, we will realize the bright watermark and full screen coverage at the front end.To crea ...

In JavaScript, event proxy, also known as event delegate, is to bind the listening event of the child object to the parent object of the event source object and trigger the event by using the event bubble principle. Advantages: 　　1. Improve performance without binding events to all objects; 　　2. Flexible and dynamically created new object ...

Getting started with Vue Vue introduction (1) What is Vue? Vue is a JavaScript framework (2) What's Vue for? Building user pages (3) What are the characteristics of Vue? Progressive Vue has two important features Two important features of vue framework? Data driven: without dom operation, Vue will automatically render the page acc ...

package introduction The package specification of CommonJS allows us to combine a set of related modules to form a complete set of tools The package specification of CommonJS consists of two parts: package structure and package description file Package structure: used to organize various files in the package Package description file (pa ...

1 form Using front-end js to verify the form can reduce a lot of unnecessary trouble and improve user satisfaction. Otherwise, as soon as you submit data, you will go directly to the back-end server and find that you didn't fill in the name after a series of verification, which will waste a lot of time. 1.1 get form     & ...

preface To use the Spring framework in a web project, we must first solve the problem of obtaining the Spring container in the web layer (here referred to as Servlet). As long as the Spring container is obtained in the web layer, the Service object can be obtained from the container. 1, Problems of using Spring in Web projects Exampl ...

catalogue 1, Concept of function 2, Use of functions 2.1 function declaration 2.2 calling functions 2.3 function encapsulation 3, Parameters of function 3.1 formal parameters and arguments 3.2 mismatch between the number of function formal parameters and real parameters 4, Return value of function 4.1 return statement 4.2 return term ...