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Dynamic table creation comparison in JS

Source: Internet
Author: User
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Objectives:Generate a 2000*5 table. The content of each cell is the row number, comma, and column number.

Method 1: Use createelement to generate a table, use insertrow and insertcell to generate rows and columns, and use innerhtml to populate the content of cells.

Method 2: Use createelement to generate a table and createelement to generate rows and columns. The content of the cell is filled with the createtextnode method.

Method 3: concatenate a string in the innerhtml attribute of the table and use the string plus = Operator to link the string.

Method 4: concatenate the string of the innerhtml attribute of the table, append each string to the array, and call the join method of the array to generate the target string.

 

Method Run Time (MS)
Method 1 93037
Method 2 3341
Method 3 2795
Method 4 500

 

<HTML>
<Head>
<Title> test page </title>
<SCRIPT type = 'text/JavaScript '>
<! --
Function createtable (){
VaR T = Document. createelement ('table ');
For (VAR I = 0; I <2000; I ++ ){
VaR r = T. insertrow ();
For (var j = 0; j <5; j ++ ){
VaR c = R. insertcell ();
C. innerhtml = I + ',' + J;
}
}

Document. getelementbyid ('table1'). appendchild (t );
T. setattribute ('border', '1 ');
}

Function createtable2 (){
VaR T = Document. createelement ('table ');
VaR B = Document. createelement ('tbody ');
For (VAR I = 0; I <2000; I ++ ){
VaR r = Document. createelement ('tr ');
For (var j = 0; j <5; j ++ ){
VaR c = Document. createelement ('td ');
VaR M = Document. createtextnode (I + ',' + J );
C. appendchild (m );
R. appendchild (C );
}
B. appendchild (R );
}

T. appendchild (B );
Document. getelementbyid ('table1'). appendchild (t );
T. setattribute ('border', '1 ');
}

Function createtable3 (){
VaR DATA = '';

Data + = '<Table border = 1> <tbody> ';
For (VAR I = 0; I <2000; I ++ ){
Data + = '<tr> ';
For (var j = 0; j <5; j ++ ){
Data + = '<TD>' + I + ',' + J + '</TD> ';
}
Data + = '</tr> ';
}
Data + = '</tbody> <Table> ';

Document. getelementbyid ('table1'). innerhtml = data;
}

function createtable4 () {
var DATA = new array ();
data. push ('







'); for (VAR I = 0; I <2000; I ++) { data. push (' '); for (var j = 0; j <5; j ++) { data. push (' '); }< br> data. push (' '); }< br> data. push ('
' + I + ',' + J + '


'); document. getelementbyid ('table1 '). innerhtml = data. join (''); }

Function showfunctionruntime (f ){
VaR T1 = new date ();
F ();
VaR t2 = new date ();
Alert (T2-t1 );
}
// -->
</SCRIPT>
</Head>
<Body>
<Div id = "Table1" style = "border: 1px solid black">
</Div>

<SCRIPT>
Showfunctionruntime (createtable );
Showfunctionruntime (createtable2 );
Showfunctionruntime (createtable3 );
Showfunctionruntime (createtable4 );
</SCRIPT>
</Body>
</Html>

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Related Keywords:
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