), elements using an ID, and classes if you use a '.' to prefix the class name.
Usage to remove our postData tag that indicates that LD+Json is being used: removeStr(value, "postData")
Usage to remove the 'foo' class from a string: removeStrBetween(str, '.foo');
*/
var removeStrBetween = function(str, selector) {
// Create a new container to operate on
var wrapped = $(" " + str + " ");
// Remove the content between the tags.
wrapped.find(selector).remove();
// Return it
return wrapped.html();
}
// Function to truncate and add an elipsis if the text exceeds a certain value
function truncateWithEllipses(text, max) {
return text.substr(0,max-1)+(text.length>max?'...':'');
}
function stripHtml(html){
html.replace(/<[^>]*>?/gm, '');
return html;
}
// Determine if a string has a space
function hasWhiteSpace(s) {
const whitespaceChars = [' ', '\t', '\n'];
return whitespaceChars.some(char => s.includes(char));
}
// ColdFusion like string functions
// ReplaceNoCase, scope is either 'all' or 'one'.
// Gregory Alexander
function replaceNoCase(string,subString,replacement, scope){
if (scope == 'all'){
// i is a RegEx ignore case flag, g is global flag
var regEx = new RegExp(subString, "ig");
} else {
// i is an RegEx ignore case flag
var regEx = new RegExp(subString, "i");
}
// i is an ignore case flag, g is global flag
var regEx = new RegExp(subString, "ig");
var result = string.replace(regEx, replacement);
return result;
}
// ColdFusion like list functions
function listLen(list, delimiter){
// Gregory Alexander
if(delimiter == null) { delimiter = ','; }
var thisLen = list.split(delimiter);
return thisLen.length;
}
function listGetAt(list, position, delimiter, zeroIndex) {
// Gregory Alexander
if(delimiter == null) { delimiter = ','; }
if(zeroIndex == null) { zeroIndex = true; }
list = list.split(delimiter);
if(list.length > position) {
if(zeroIndex){
// Better handling for JavaScript arrays
return list[position];
} else {
// Handles like the CF version without a zero-index
return list[position-1];
}
} else {
return 0;
}
}
function listFind(list, value, delimiter) {
// Adapted from a variety of sources by Gregory Alexander
var result = 0;
if(delimiter == null) delimiter = ',';
list = list.split(delimiter);
for ( var i = 0; i < list.length; i++ ) {
if ( value == list[i] ) {
result = i + 1;
return result;
}
}
return result;
}
// Compares two lists of comma seperated strings. Used to determine if the selected capabilities match the default capabilities for a given role. Function based on the listCompare method found in cflib.
function listCompare(string1, string2){
// Adapted from a variety of sources by Gregory Alexander
var s = string1.split(",");
for(var k = 0 ;k < s.length; k++){
if(string2.indexOf("," + s[k] + ",") ){
return true;
}
}
return false;
}
// Adds a value to a comma separated list. Will not add the value if the list already contains the value.
function listAppend(list, value) {
// Adapted from a variety of sources by Gregory Alexander
var re = new RegExp('(^|\\b)' + value + '(\\b|$)');
if (!re.test(list)) {
return list + (list.length? ',' : '') + value;
}
return list;
}
// Removes a value to a comma separated list. Based on the ListDeleteValue function by Ben Nadel CF fuction https://gist.github.com/bennadel/9753040
var listDeleteValue = function(list, value){
// Adapted from a variety of sources by Gregory Alexander
var values = list.split(",");
for(var i = 0 ; i < values.length ; i++) {
if (values[i] == value) {
values.splice(i, 1);
return values.join(",");
}
}
return list;
}
// URL functions
//
// parseUri 1.2.2
// (c) Steven Levithan
// MIT License
/*
Splits any well-formed URI into the following parts (all are optional):
----------------------
- source (since the exec method returns the entire match as key 0, we might as well use it)
- protocol (i.e., scheme)
- authority (includes both the domain and port)
- domain (i.e., host; can be an IP address)
- port
- path (includes both the directory path and filename)
- directoryPath (supports directories with periods, and without a trailing backslash)
- fileName
- query (does not include the leading question mark)
- anchor (i.e., fragment) */
function parseUri (str) {
var o = parseUri.options,
m = o.parser[o.strictMode ? "strict" : "loose"].exec(str),
uri = {},
i = 14;
while (i--) uri[o.key[i]] = m[i] || "";
uri[o.q.name] = {};
uri[o.key[12]].replace(o.q.parser, function ($0, $1, $2) {
if ($1) uri[o.q.name][$1] = $2;
});
return uri;
};
parseUri.options = {
strictMode: false,
key: ["source","protocol","authority","userInfo","user","password","host","port","relative","path","directory","file","query","anchor"],
q: {
name: "queryKey",
parser: /(?:^|&)([^&=]*)=?([^&]*)/g
},
parser: {
strict: /^(?:([^:\/?#]+):)?(?:\/\/((?:(([^:@]*)(?::([^:@]*))?)?@)?([^:\/?#]*)(?::(\d*))?))?((((?:[^?#\/]*\/)*)([^?#]*))(?:\?([^#]*))?(?:#(.*))?)/,
loose: /^(?:(?![^:@]+:[^:@\/]*@)([^:\/?#.]+):)?(?:\/\/)?((?:(([^:@]*)(?::([^:@]*))?)?@)?([^:\/?#]*)(?::(\d*))?)(((\/(?:[^?#](?![^?#\/]*\.[^?#\/.]+(?:[?#]|$)))*\/?)?([^?#\/]*))(?:\?([^#]*))?(?:#(.*))?)/
}
};
// Dump function. Use like you would with cfdump.
// function to dump out a a javascript object.
function mydump(arr,level) {
var dumped_text = "";
if(!level) level = 0;
var level_padding = "";
for(var j=0;j \"" + value + "\"\n";
}
}
} else {
dumped_text = "===>"+arr+"<===("+typeof(arr)+")";
}
console.log(dumped_text);
}
How to make the perfect social media sharing image - part 4 Image Examples
by Gregory Alexander
After the last entry, I wanted to show you the social media images that were created by ColdFusion. Each of these images match the exact recommended size and the ratio aspect that are recommended by the various social media platforms. I'll show you the actual images that were created, and how the social media platform displayed the images after I shared the previous article.
The images
The first image to the left is the original image that was uploaded. This is a picture of my dog, Toby, a super-smart, 13 y.o. bundle of energy running in the snow. The second image, in the middle, is the Facebook social media image, and the image to the right is the Twitter social media image. All of the social media images are copies of the original.
Galaxie Blog will automatically take the image that you want to post, and create Facebook and Twitter social media images that are sized per the social media's recommendations. The Facebook social media image is 1200 pixels wide, and 630 in height. Twitter is similar, but just a hair shorter. They are 1200 pixels wide, and 628 pixels in height. ![]()
How the page renders on social media sites
Below are the social media sites render the page when it is shared. The images below are actual screen shot's of the last post I shared in part 3 of this series. Again, the image to the left is the original. The middle image is how Facebook presents the site, and the image to the right is how Twitter displays the share.
Both Facebook and Twitter will take the images that were created by Galaxie Blog, and resize them into their own format. As long as the images either meet the maximum or minimum dimensions as they do here, the site presentation of the share will look good.
![]()
Note: this approach works for Slack and LinkedIn sites, but this is outside of the narrow Facebook and Twitter scope that I wanted to blog about.
Next up in this series, how to properly use the meta tags for social media sharing.
Tags
ColdFusion
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Gregory Alexander
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Hi, my name is Gregory! I have several degrees in computer graphics and multimedia authoring, and I have been developing enterprise web applications for the last 25 years. I love web technologies and the outdoors and am passionate about giving back to the community.
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This entry was posted on November 2, 2019 at 1:45 AM and has received 2462 views.
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