Updated April 14, 2023
Definition of JavaScript Range
JavaScript Range is a function that is supported by JavaScript in order to return all the integer and its value from starting to the ending while traversing from start index to the end index. The concept of the range is basically derived from the concept of selection which includes a pair of boundary points with the start range and end range. Each point lying in this range represents the data object model and provides the user an opportunity to limit the size and the range of the selected area for performing any action on the range area.
Syntax
As mentioned, the range is a function hence, it will contain some parameters or arguments to pass from the function which will designate the start and end range for the indices. Further, this range function will return a list of integers from start to end.
function range(start, end) {
// body of the function
// return list of integers that will be lying within the range of the declared function.
}Syntax flow will be somewhat in a pattern where the range will be lying within the start and end of the function and will comprise of the body of the function and will, in turn, return the list of integers lying within the range of declared functions.
How does Range Work in JavaScript?
The range is a concept in JavaScript which provides a lot of added advantages to the programmers for setting anything or for implementing any requirement with the return type or manipulation including return type with list of integers. Selection and Range are the two most essential component for JavaScript in order to perform some functionality related to the enhancement of the form view or improvisation of the entire list of arrays with the list of the return type. The basic subset of the range is a selection that gives programmers the privilege the selection with a specific range of the area where the major or the minor changes are needed to be performed. The selected area will include some specific area for making changes which in turn includes a pair which comprises of boundary values for illustrating and providing the start and end index with a range.
Each point lying within the boundary as a value has its own significance. It represents the parent Data Object Model node which is mostly responsible for setting up the relativeness for offset for its start. Now the parent node is considered as an element node and the offset for a child node is considered for positioning the text and the scope of the text area. There are numerous ways of setting the range for offsets with specific values of ranges and then providing the estimation for the values to give the specific area to perform the task that is needed to be performed. Then we can set the boundaries using the ranges and values like range.setStart(node, offset) and range.setEnd(node,offset). One object which is associated with the range function also pertains to some very important functionalities which are responsible for the entire workflow and provocation of the range arguments within the function. Let’s check for the properties of the range object which are startContainer, startOffset, endContainer, and endOffset. startContainer stands for the node which is going to initiate the starting range for the node and then startOffset which stands for the offset of the start of the node for containers. endContainer which stands for denoting the end of the range of the node and endOffset signifies the end of the range with its value and designation.
Also, some conditions are also prevailing as part of the mentioned components which are collapsed and commonAncestorContainer. Collapsed mainly depends on the Boolean value which Is described as either true or false. In case the range starts and ends on the same point then the condition arises for the collapsed condition. commonAncestorContainer is the component for the container where all the common ancestors for the component lies within the range of the properties of the elements and components constituting the entire nodes. The range is the function which comprises methods that can be changed and manipulated accordingly within the stipulated ranges. The methods mentioned include Set range start and set range end methods which further includes many methods which can be bifurcated into two genres namely:
Set Range Starting method includes:
- setStart(node, offset): This method as part of the range is used for setting the start for positioning offset in the node.
- setStartBefore(node): This method as part of the range is used for setting the start just before positioning offset in the node.
- setStartAfter(node): This method as part of the range is used for setting up the start node just after positioning offset in the node.
Set Range End method includes:
- setEnd(node, offset): This method as part of the range is used for setting the end for positioning offset in the node.
- setEndBefore(node): This method as part of the range is used for setting the end just before positioning offset in node
- setEndAfter(node): This method as part of the range is used for setting the end just after positioning offset in the node.
Examples of JavaScript Range
Following are the examples are given below:
Example #1
This program demonstrates the range by setting the range function and then computing the number with for loop with the set of start and end index as shown in the output.
Code:
function* range(_start_, _end_) {
for (let h = _start_; h <= _end_; h++) {
yield h;
}
}
for (h of range(2, 6)) {
console.log(h);
}Output:
Example #2
This program demonstrates the range by setting the range function and then computing the number with for loop with the set of start and end index for a newly created array as shown in the output.
Code:
function range(_start_, _end_) {
return (new Array(_end_ - _start_ + 1)).fill(undefined).map((_, k) =>k + _start_);
}
for (Array of range(4, 8)) {
console.log(Array);
}Output:
Conclusion
JavaScript Range has simplified the programmer’s pattern of setting the range for any manipulation or computation of data within the area that is selected by the boundary points of the area. The setting of the range with the defined values makes a lot of difference for computing the required number and area within the range.
Recommended Articles
This is a guide to JavaScript Range. Here we also discuss the definition and how does range work in javascript? along with different examples and its code implementation. You may also have a look at the following articles to learn more –
